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Pragmatic Free Trial Meta<br><br>Pragmatic Free Trail Meta is an open data platform that enables research into pragmatic trials. It shares clean trial data and ratings using PRECIS-2 which allows for multiple and varied meta-epidemiological studies to evaluate the effect of treatment on trials with different levels of pragmatism as well as other design features.<br><br>Background<br><br>Pragmatic trials are becoming more widely recognized as providing real-world evidence to support clinical decision-making. However, the use of the term "pragmatic" is not uniform and its definition and assessment requires further clarification. Pragmatic trials are intended to guide clinical practices and policy decisions, not to prove a physiological or clinical hypothesis. A pragmatic trial should aim to be as close as it is to actual clinical practices that include recruiting participants, setting up, implementation and delivery of interventions, determination and analysis outcomes, and primary analyses. This is a key distinction from explanation trials (as described by Schwartz and Lellouch1), which are intended to provide a more thorough proof of an idea.<br><br>Truly pragmatic trials should not blind participants or clinicians. This can lead to bias in the estimations of treatment effects. The pragmatic trials also include patients from various health care settings to ensure that the results can be generalized to the real world.<br><br>Finally, pragmatic trials must be focused on outcomes that matter to patients, such as the quality of life and functional recovery. This is especially important in trials that require the use of invasive procedures or could have harmful adverse impacts. The CRASH trial29 compared a 2 page report with an electronic monitoring system for patients in hospitals with chronic cardiac failure. The trial with a catheter, on the other hand was based on symptomatic catheter-related urinary tract infection as the primary outcome.<br><br>In addition to these features, pragmatic trials should minimize the trial procedures and data collection requirements in order to reduce costs. Furthermore, pragmatic trials should seek to make their findings as applicable to clinical practice as possible by ensuring that their primary analysis follows the intention-to treat approach (as described in CONSORT extensions for pragmatic trials).<br><br>Despite these criteria however, a large number of RCTs with features that defy the notion of pragmatism were incorrectly labeled pragmatic and published in journals of all types. This can lead to false claims about pragmatism, and the term's use should be standardised. The creation of a PRECIS-2 tool that provides an objective and standardized evaluation of pragmatic aspects is a first step.<br><br>Methods<br><br>In a pragmatic study,  [https://wisesocialsmedia.com/story3401510/15-reasons-why-you-shouldn-t-overlook-pragmatic-kr 무료 프라그마틱] 플레이 - [https://bookmarkspecial.com/story18238861/it-s-enough-15-things-about-free-slot-pragmatic-we-re-tired-of-hearing you can look here] - the aim is to inform policy or clinical decisions by demonstrating how the intervention can be incorporated into real-world routine care. Explanatory trials test hypotheses regarding the cause-effect relationship within idealised conditions. Therefore, pragmatic trials could have less internal validity than explanatory trials, and could be more susceptible to bias in their design, conduct and analysis. Despite their limitations, [https://bookmarkingace.com/story18080397/20-best-tweets-of-all-time-concerning-pragmatic-official-website 프라그마틱 무료체험 슬롯버프] pragmatic studies can provide valuable information for decision-making within the healthcare context.<br><br>The PRECIS-2 tool assesses the degree of pragmatism within an RCT by assessing it on 9 domains ranging from 1 (very explicative) to 5 (very pragmatic). In this study the areas of recruitment, organisation and flexibility in delivery, flexibility in adherence, and follow-up received high scores. However, the main outcome and the method of missing data was scored below the pragmatic limit. This suggests that a trial can be designed with effective practical features, yet not damaging the quality.<br><br>It is difficult to determine the degree of pragmatism within a specific study because pragmatism is not a have a single characteristic. Certain aspects of a research study can be more pragmatic than other. A trial's pragmatism can be affected by changes to the protocol or the logistics during the trial. In addition 36% of the 89 pragmatic trials identified by Koppenaal and colleagues were placebo-controlled, or conducted prior to licensing, and the majority were single-center. Thus, they are not very close to usual practice and can only be called pragmatic in the event that their sponsors are supportive of the absence of blinding in these trials.<br><br>Another common aspect of pragmatic trials is that the researchers try to make their results more relevant by analyzing subgroups of the sample. This can lead to unbalanced analyses that have lower statistical power. This increases the possibility of omitting or ignoring differences in the primary outcomes. This was a problem in the meta-analysis of pragmatic trials due to the fact that secondary outcomes were not adjusted for differences in covariates at the time of baseline.<br><br>In addition, pragmatic trials can also be a challenge in the collection and interpretation of safety data. It is because adverse events are typically self-reported and are susceptible to delays, errors or coding errors. It is therefore crucial to improve the quality of outcome for these trials, in particular by using national registries instead of relying on participants to report adverse events on the trial's database.<br><br>Results<br><br>While the definition of pragmatism doesn't require that clinical trials be 100% pragmatist there are benefits of including pragmatic elements in trials. These include:<br><br>Enhancing sensitivity to issues in the real world as well as reducing study size and cost as well as allowing trial results to be more quickly implemented into clinical practice (by including patients who are routinely treated). However, pragmatic trials may also have disadvantages. The right amount of heterogeneity for instance, can help a study expand its findings to different settings or patients. However the wrong type of heterogeneity could reduce the assay sensitivity, and therefore lessen the power of a trial to detect minor treatment effects.<br><br>A number of studies have attempted to classify pragmatic trials using various definitions and scoring systems. Schwartz and Lellouch1 created an approach to distinguish between explanation-based trials that support the clinical or physiological hypothesis as well as pragmatic trials that aid in the selection of appropriate treatments in the real-world clinical setting. The framework was comprised of nine domains, each scored on a scale of 1-5, with 1 indicating more explanatory and 5 indicating more practical. The domains were recruitment, setting, intervention delivery with flexibility, follow-up and primary analysis.<br><br>The original PRECIS tool3 was built on the same scale and domains. Koppenaal and colleagues10 developed an adaptation to this assessment called the Pragmascope that was easier to use in systematic reviews. They discovered that pragmatic reviews scored higher across all domains, however they scored lower in the primary analysis domain.<br><br>The difference in the primary analysis domains can be explained by the way that most pragmatic trials analyze data. Certain explanatory trials however do not. The overall score for systematic reviews that were pragmatic was lower when the areas of organization, flexible delivery, and following-up were combined.<br><br>It is crucial to keep in mind that a study that is pragmatic does not mean that a trial is of poor quality. In fact, there is a growing number of clinical trials that use the term 'pragmatic' either in their abstract or title (as defined by MEDLINE however it is neither precise nor sensitive). The use of these words in abstracts and titles may suggest a greater awareness of the importance of pragmatism but it is unclear whether this is evident in the content of the articles.<br><br>Conclusions<br><br>As the value of real-world evidence grows popular and pragmatic trials have gained traction in research. They are randomized trials that evaluate real-world care alternatives to experimental treatments in development. They include patient populations that are more similar to those who receive treatment in regular care. This method is able to overcome the limitations of observational research like the biases that are associated with the reliance on volunteers and the limited availability and coding variations in national registries.<br><br>Pragmatic trials have other advantages, such as the ability to draw on existing data sources and 프라그마틱 공식홈페이지; [https://pragmatic-kr46677.webdesign96.com/30387370/the-top-pragmatic-experience-gurus-are-doing-three-things https://pragmatic-kr46677.webdesign96.com], a higher chance of detecting significant distinctions from traditional trials. However, they may still have limitations that undermine their reliability and generalizability. Participation rates in some trials could be lower than expected because of the healthy-volunteering effect, financial incentives, or competition from other research studies. The requirement to recruit participants in a timely fashion also reduces the size of the sample and the impact of many pragmatic trials. Certain pragmatic trials lack controls to ensure that observed variations aren't due to biases in the trial.<br><br>The authors of the Pragmatic Free Trial Meta identified RCTs that were published between 2022 and 2022 that self-described as pragmatism. They assessed pragmatism by using the PRECIS-2 tool, which includes the eligibility criteria for domains and recruitment criteria, as well as flexibility in intervention adherence, and follow-up. They found that 14 of these trials scored as highly or pragmatic sensible (i.e. scores of 5 or higher) in one or more of these domains and that the majority were single-center.<br><br>Trials that have high pragmatism scores tend to have more criteria for eligibility than traditional RCTs. They also include patients from a variety of hospitals. The authors claim that these characteristics can help make the pragmatic trials more relevant and applicable to daily practice, but they do not guarantee that a trial using a pragmatic approach is free of bias. Furthermore, the pragmatism of trials is not a fixed attribute; a pragmatic trial that does not possess all the characteristics of a explanatory trial can produce valuable and reliable results.
Pragmatic Free Trial Meta<br><br>Pragmatic Free Trial Meta is a free and non-commercial open data platform and infrastructure that supports research on pragmatic trials. It collects and distributes cleaned trial data,  [https://bookmarkusers.com/story18148945/this-is-the-pragmatic-site-case-study-you-ll-never-forget 프라그마틱 사이트] 슬롯, [https://myfirstbookmark.com/story18338578/15-reasons-you-must-love-pragmatic-image mouse click the up coming internet site], ratings and evaluations using PRECIS-2. This allows for diverse meta-epidemiological analyses that compare treatment effect estimates across trials of different levels of pragmatism.<br><br>Background<br><br>Pragmatic studies provide real-world evidence that can be used to make clinical decisions. However, the use of the term "pragmatic" is not consistent and its definition and assessment requires further clarification. Pragmatic trials must be designed to guide clinical practice and policy decisions, rather than confirm a physiological or clinical hypothesis. A pragmatic trial should aim to be as close as is possible to the real-world clinical practice which include the recruitment of participants, setting, designing, delivery and execution of interventions, determining and analysis results, as well as primary analysis. This is a significant difference between explanation-based trials, as defined by Schwartz and Lellouch1 which are designed to confirm a hypothesis in a more thorough way.<br><br>Trials that are truly practical should not attempt to blind participants or the clinicians, as this may lead to bias in estimates of treatment effects. The trials that are pragmatic should also try to enroll patients from a wide range of health care settings, so that their results can be applied to the real world.<br><br>Finally the focus of pragmatic trials should be on outcomes that are important to patients, such as quality of life or functional recovery. This is particularly relevant when trials involve surgical procedures that are invasive or may have harmful adverse consequences. The CRASH trial29, for instance was focused on functional outcomes to compare a two-page report with an electronic system for the monitoring of hospitalized patients with chronic heart failure. In addition, the catheter trial28 focused on urinary tract infections that are symptomatic of catheters as its primary outcome.<br><br>In addition to these characteristics, pragmatic trials should minimize the trial procedures and data collection requirements in order to reduce costs. Additionally, pragmatic trials should aim to make their results as applicable to current clinical practices as they can. This can be achieved by ensuring that their analysis is based on the intention to treat method (as described within CONSORT extensions).<br><br>Many RCTs that do not meet the criteria for pragmatism but contain features contrary to pragmatism, have been published in journals of different types and incorrectly labeled pragmatic. This can lead to false claims of pragmatism, and the usage of the term should be standardized. The creation of the PRECIS-2 tool, which offers an objective and standard assessment of pragmatic features, is a good first step.<br><br>Methods<br><br>In a practical trial the goal is to inform policy or clinical decisions by demonstrating how the intervention can be implemented into routine care. Explanatory trials test hypotheses about the causal-effect relationship in idealized settings. In this way, pragmatic trials may have a lower internal validity than studies that explain and be more susceptible to biases in their design, analysis, and conduct. Despite these limitations, pragmatic trials can be a valuable source of information for decision-making in the context of healthcare.<br><br>The PRECIS-2 tool scores an RCT on 9 domains, ranging between 1 and 5 (very pragmatist). In this study, the domains of recruitment, organisation, flexibility in delivery, flexibility in adherence, and follow-up scored high. However, the main outcome and the method of missing data was scored below the pragmatic limit. This suggests that a trial could be designed with effective practical features, but without harming the quality of the trial.<br><br>However, it's difficult to judge how practical a particular trial is, since the pragmatism score is not a binary quality; certain aspects of a trial may be more pragmatic than others. Furthermore, logistical or protocol modifications made during a trial can change its score on pragmatism. Additionally 36% of 89 pragmatic trials discovered by Koppenaal and colleagues were placebo-controlled or conducted prior to approval and a majority of them were single-center. They are not in line with the usual practice and are only called pragmatic if their sponsors agree that the trials aren't blinded.<br><br>Another common aspect of pragmatic trials is that the researchers attempt to make their findings more meaningful by analysing subgroups of the sample. However,  [https://bookmarkpressure.com/story18246026/a-an-instructional-guide-to-pragmatic-demo-from-beginning-to-end 프라그마틱 슬롯체험] this often leads to unbalanced comparisons and lower statistical power, increasing the likelihood of missing or misinterpreting the results of the primary outcome. This was the case in the meta-analysis of pragmatic trials due to the fact that secondary outcomes were not corrected for differences in covariates at the baseline.<br><br>Additionally, studies that are pragmatic can pose difficulties in the collection and interpretation of safety data. This is due to the fact that adverse events are typically reported by participants themselves and prone to reporting errors, delays or coding deviations. It is essential to increase the accuracy and quality of outcomes in these trials.<br><br>Results<br><br>While the definition of pragmatism does not mean that trials must be 100% pragmatic, there are some advantages to incorporating pragmatic components into clinical trials. These include:<br><br>Enhancing sensitivity to issues in the real world as well as reducing the size of studies and their costs and allowing the study results to be more quickly translated into actual clinical practice (by including patients from routine care). However, pragmatic trials have their disadvantages. The right amount of heterogeneity for instance could allow a study to expand its findings to different patients or settings. However the wrong type of heterogeneity could reduce the sensitivity of an assay and thus lessen the power of a trial to detect small treatment effects.<br><br>Many studies have attempted classify pragmatic trials using a variety of definitions and scoring methods. Schwartz and Lellouch1 created an approach to distinguish between explanatory trials that confirm the clinical or physiological hypothesis as well as pragmatic trials that aid in the selection of appropriate treatments in the real-world clinical setting. The framework consisted of nine domains scored on a 1-5 scale which indicated that 1 was more explanatory while 5 was more pragmatic. The domains included recruitment and setting up, the delivery of intervention, flexible adherence and primary analysis.<br><br>The initial PRECIS tool3 had similar domains and an assessment scale ranging from 1 to 5. Koppenaal and colleagues10 developed an adaptation to this assessment dubbed the Pragmascope that was simpler to use in systematic reviews. They found that pragmatic systematic reviews had a higher average score in most domains but lower scores in the primary analysis domain.<br><br>This distinction in the main analysis domain could be explained by the fact that the majority of pragmatic trials analyse their data in the intention to treat way, whereas some explanatory trials do not. The overall score was lower for pragmatic systematic reviews when the domains of organisation, flexible delivery and follow-up were combined.<br><br>It is important to remember that a pragmatic study does not necessarily mean a low-quality study. In fact, there is an increasing number of clinical trials that use the term "pragmatic" either in their title or abstract (as defined by MEDLINE but which is neither sensitive nor precise). The use of these terms in abstracts and titles could suggest a greater awareness of the importance of pragmatism but it is unclear whether this is manifested in the content of the articles.<br><br>Conclusions<br><br>As the importance of real-world evidence becomes increasingly widespread the pragmatic trial has gained popularity in research. They are randomized trials that compare real world alternatives to new treatments that are being developed. They involve patient populations closer to those treated in regular care. This method is able to overcome the limitations of observational research, for example, the biases that are associated with the reliance on volunteers, as well as the insufficient availability and the coding differences in national registry.<br><br>Pragmatic trials have other advantages, including the ability to use existing data sources and a higher chance of detecting significant differences from traditional trials. However, pragmatic tests may still have limitations which undermine their validity and generalizability. For example, participation rates in some trials may be lower than expected due to the healthy-volunteer effect as well as incentives to pay or compete for  [https://bookmark-share.com/story18348730/25-shocking-facts-about-pragmatic-casino 프라그마틱 슬롯 추천] participants from other research studies (e.g., industry trials). The necessity to recruit people in a timely fashion also limits the sample size and impact of many pragmatic trials. Some pragmatic trials also lack controls to ensure that any observed differences aren't due to biases in the trial.<br><br>The authors of the Pragmatic Free Trial Meta identified RCTs published up to 2022 that self-described themselves as pragmatic. The PRECIS-2 tool was employed to evaluate the pragmatism of these trials. It includes areas like eligibility criteria and flexibility in recruitment and adherence to intervention and follow-up. They discovered that 14 of these trials scored highly or pragmatic pragmatic (i.e. scoring 5 or higher) in one or more of these domains, and that the majority of them were single-center.<br><br>Trials with a high pragmatism score tend to have broader eligibility criteria than traditional RCTs which have very specific criteria that aren't likely to be present in the clinical setting, and include populations from a wide range of hospitals. The authors argue that these traits can make pragmatic trials more meaningful and relevant to daily practice, but they do not necessarily guarantee that a trial using a pragmatic approach is free from bias. The pragmatism characteristic is not a definite characteristic; a pragmatic test that doesn't have all the characteristics of an explanation study may still yield valuable and valid results.

Latest revision as of 08:14, 27 December 2024

Pragmatic Free Trial Meta

Pragmatic Free Trial Meta is a free and non-commercial open data platform and infrastructure that supports research on pragmatic trials. It collects and distributes cleaned trial data, 프라그마틱 사이트 슬롯, mouse click the up coming internet site, ratings and evaluations using PRECIS-2. This allows for diverse meta-epidemiological analyses that compare treatment effect estimates across trials of different levels of pragmatism.

Background

Pragmatic studies provide real-world evidence that can be used to make clinical decisions. However, the use of the term "pragmatic" is not consistent and its definition and assessment requires further clarification. Pragmatic trials must be designed to guide clinical practice and policy decisions, rather than confirm a physiological or clinical hypothesis. A pragmatic trial should aim to be as close as is possible to the real-world clinical practice which include the recruitment of participants, setting, designing, delivery and execution of interventions, determining and analysis results, as well as primary analysis. This is a significant difference between explanation-based trials, as defined by Schwartz and Lellouch1 which are designed to confirm a hypothesis in a more thorough way.

Trials that are truly practical should not attempt to blind participants or the clinicians, as this may lead to bias in estimates of treatment effects. The trials that are pragmatic should also try to enroll patients from a wide range of health care settings, so that their results can be applied to the real world.

Finally the focus of pragmatic trials should be on outcomes that are important to patients, such as quality of life or functional recovery. This is particularly relevant when trials involve surgical procedures that are invasive or may have harmful adverse consequences. The CRASH trial29, for instance was focused on functional outcomes to compare a two-page report with an electronic system for the monitoring of hospitalized patients with chronic heart failure. In addition, the catheter trial28 focused on urinary tract infections that are symptomatic of catheters as its primary outcome.

In addition to these characteristics, pragmatic trials should minimize the trial procedures and data collection requirements in order to reduce costs. Additionally, pragmatic trials should aim to make their results as applicable to current clinical practices as they can. This can be achieved by ensuring that their analysis is based on the intention to treat method (as described within CONSORT extensions).

Many RCTs that do not meet the criteria for pragmatism but contain features contrary to pragmatism, have been published in journals of different types and incorrectly labeled pragmatic. This can lead to false claims of pragmatism, and the usage of the term should be standardized. The creation of the PRECIS-2 tool, which offers an objective and standard assessment of pragmatic features, is a good first step.

Methods

In a practical trial the goal is to inform policy or clinical decisions by demonstrating how the intervention can be implemented into routine care. Explanatory trials test hypotheses about the causal-effect relationship in idealized settings. In this way, pragmatic trials may have a lower internal validity than studies that explain and be more susceptible to biases in their design, analysis, and conduct. Despite these limitations, pragmatic trials can be a valuable source of information for decision-making in the context of healthcare.

The PRECIS-2 tool scores an RCT on 9 domains, ranging between 1 and 5 (very pragmatist). In this study, the domains of recruitment, organisation, flexibility in delivery, flexibility in adherence, and follow-up scored high. However, the main outcome and the method of missing data was scored below the pragmatic limit. This suggests that a trial could be designed with effective practical features, but without harming the quality of the trial.

However, it's difficult to judge how practical a particular trial is, since the pragmatism score is not a binary quality; certain aspects of a trial may be more pragmatic than others. Furthermore, logistical or protocol modifications made during a trial can change its score on pragmatism. Additionally 36% of 89 pragmatic trials discovered by Koppenaal and colleagues were placebo-controlled or conducted prior to approval and a majority of them were single-center. They are not in line with the usual practice and are only called pragmatic if their sponsors agree that the trials aren't blinded.

Another common aspect of pragmatic trials is that the researchers attempt to make their findings more meaningful by analysing subgroups of the sample. However, 프라그마틱 슬롯체험 this often leads to unbalanced comparisons and lower statistical power, increasing the likelihood of missing or misinterpreting the results of the primary outcome. This was the case in the meta-analysis of pragmatic trials due to the fact that secondary outcomes were not corrected for differences in covariates at the baseline.

Additionally, studies that are pragmatic can pose difficulties in the collection and interpretation of safety data. This is due to the fact that adverse events are typically reported by participants themselves and prone to reporting errors, delays or coding deviations. It is essential to increase the accuracy and quality of outcomes in these trials.

Results

While the definition of pragmatism does not mean that trials must be 100% pragmatic, there are some advantages to incorporating pragmatic components into clinical trials. These include:

Enhancing sensitivity to issues in the real world as well as reducing the size of studies and their costs and allowing the study results to be more quickly translated into actual clinical practice (by including patients from routine care). However, pragmatic trials have their disadvantages. The right amount of heterogeneity for instance could allow a study to expand its findings to different patients or settings. However the wrong type of heterogeneity could reduce the sensitivity of an assay and thus lessen the power of a trial to detect small treatment effects.

Many studies have attempted classify pragmatic trials using a variety of definitions and scoring methods. Schwartz and Lellouch1 created an approach to distinguish between explanatory trials that confirm the clinical or physiological hypothesis as well as pragmatic trials that aid in the selection of appropriate treatments in the real-world clinical setting. The framework consisted of nine domains scored on a 1-5 scale which indicated that 1 was more explanatory while 5 was more pragmatic. The domains included recruitment and setting up, the delivery of intervention, flexible adherence and primary analysis.

The initial PRECIS tool3 had similar domains and an assessment scale ranging from 1 to 5. Koppenaal and colleagues10 developed an adaptation to this assessment dubbed the Pragmascope that was simpler to use in systematic reviews. They found that pragmatic systematic reviews had a higher average score in most domains but lower scores in the primary analysis domain.

This distinction in the main analysis domain could be explained by the fact that the majority of pragmatic trials analyse their data in the intention to treat way, whereas some explanatory trials do not. The overall score was lower for pragmatic systematic reviews when the domains of organisation, flexible delivery and follow-up were combined.

It is important to remember that a pragmatic study does not necessarily mean a low-quality study. In fact, there is an increasing number of clinical trials that use the term "pragmatic" either in their title or abstract (as defined by MEDLINE but which is neither sensitive nor precise). The use of these terms in abstracts and titles could suggest a greater awareness of the importance of pragmatism but it is unclear whether this is manifested in the content of the articles.

Conclusions

As the importance of real-world evidence becomes increasingly widespread the pragmatic trial has gained popularity in research. They are randomized trials that compare real world alternatives to new treatments that are being developed. They involve patient populations closer to those treated in regular care. This method is able to overcome the limitations of observational research, for example, the biases that are associated with the reliance on volunteers, as well as the insufficient availability and the coding differences in national registry.

Pragmatic trials have other advantages, including the ability to use existing data sources and a higher chance of detecting significant differences from traditional trials. However, pragmatic tests may still have limitations which undermine their validity and generalizability. For example, participation rates in some trials may be lower than expected due to the healthy-volunteer effect as well as incentives to pay or compete for 프라그마틱 슬롯 추천 participants from other research studies (e.g., industry trials). The necessity to recruit people in a timely fashion also limits the sample size and impact of many pragmatic trials. Some pragmatic trials also lack controls to ensure that any observed differences aren't due to biases in the trial.

The authors of the Pragmatic Free Trial Meta identified RCTs published up to 2022 that self-described themselves as pragmatic. The PRECIS-2 tool was employed to evaluate the pragmatism of these trials. It includes areas like eligibility criteria and flexibility in recruitment and adherence to intervention and follow-up. They discovered that 14 of these trials scored highly or pragmatic pragmatic (i.e. scoring 5 or higher) in one or more of these domains, and that the majority of them were single-center.

Trials with a high pragmatism score tend to have broader eligibility criteria than traditional RCTs which have very specific criteria that aren't likely to be present in the clinical setting, and include populations from a wide range of hospitals. The authors argue that these traits can make pragmatic trials more meaningful and relevant to daily practice, but they do not necessarily guarantee that a trial using a pragmatic approach is free from bias. The pragmatism characteristic is not a definite characteristic; a pragmatic test that doesn't have all the characteristics of an explanation study may still yield valuable and valid results.