Sentences with phrase «external validity of the studies»

With that background, I'll take you quickly through my ratings of the internal and external validity of the studies that have been most frequently cited in the debate on the Obama administration's proposal for Preschool for All and related efforts.

However, purposive selection of study site does leave a question on the external validity of the study for whole Nepal.

Not exact matches

We matched ResQu items to domains identified by these authors as critical to study quality, internal and external validity, and standard of reporting.

The authors say: «It is possible that either AET, RT or CT may be easier to perform effectively without supervision, thus affecting the external validity of these results since only studies with supervised training were included.»

The studies [xi] of the Georgia and Oklahoma universal pre-k programs get the highest grade for external validity because the programs in these two states have been held up by President Obama and others as models to be replicated across the nation.

This study provides the strongest evidence available on the greater return on investment of targeted preschool interventions in contrast to universal programs in which money is spent on all children, with the limitations on external validity I've described.

These studies also are weak with regards to external validity because the research design does not permit a determination of whether the pre-k program improves performance in elementary school — the control group begins to receive the pre-k program just after the children are initially tested, which means there is no untreated control group with which to benchmark performance in kindergarten and thereafter.

The studies of the Georgia and Oklahoma universal pre-k programs get the highest grade for external validity because the programs in these two states have been held up by President Obama and others as models to be replicated across the nation.

Not one of the studies that has suggested long - term positive impacts of center - based early childhood programs has been based on a well - implemented and appropriately analyzed randomized trial, and nearly all have serious limitations in external validity.

In contrast, the only two studies in the list with both high internal and external validity (Head Start Impact and Tennessee) find null or negative impacts, and all of the studies that point to very small, null, or negative effects have high external validity.

The study has very little external validity, which is a polite way of saying its findings shouldn't be generalized to other contexts.

The researchers acknowledge three specific limitations in this study: challenges with validity and external reliability of the authentic instruction rating scale, missing data due to fluctuations in teacher participation during the duration of the study, and the inability to account for a variety of variables that may impact study outcomes due to the limited time frame and scope of the program in which the study took place

The purpose of this paper is to review the evidence base for three widely - used home visiting programs that have met the federal criteria for evidence - based to highlight the limits to both the internal and external validity of the evidence and to provide a case study as a point of comparison using data from a large, statewide implementation effort.

This article presents three studies examining the internal and external validity of GOALS and the stability of life goals over a period of two years.

The results of the three studies confirm that the life goal questionnaire GOALS possesses high internal und external validity.

Second, only 17 % of applicants could be included in the study, which might limit the external validity of the present findings.

An analysis of the mall study shows that beyond the external misrepresentations, internal scientific methodological errors cast doubt on the validity of the claims that have been attributed to the mall study within scholarly and legal arenas.

Interestingly, the promising external validity of the FEEL - KJ has now also received support from two other studies in which relations were shown with binge eating [15], depressive symptoms [14,15], and with the DSM symptom clusters affective problems, somatic problems, conduct problems, and ADHD problems [14].

The strengths of the study include: a naturalistic setting, which increases the external validity of the findings, a multimethod assessment of two outcomes (parenting and child problem behavior), availability of four data points, minimal attrition across waves, and LGM analyses that specified and tested a theoretically based potential mediator of program effects.

Compared with prior research, our study significantly expands inquiry in this area by broadening the range of social participation indicators examined, increasing the external validity of findings, focusing on the under - studied developmental stage of adolescence, and taking an ecological approach that included many potential correlates of social participation.

In summary, compared with prior research, our study significantly expands inquiry in this area by broadening the range of social participation indicators examined, by increasing the external validity of findings, by focusing on the under - studied developmental stage of adolescence, and by taking an ecological approach that included many potential correlates of social participation.

«As with all studies that focus on usefully unusual settings, there is a question of generalizability and external validity.