Sentences with phrase «internal validity of these studies»

There are serious issues with the internal validity of these studies as well.

The problem here is a lack of control prevents us from being able to test the internal validity of the study.

No significant interaction of intervention condition (control vs full) with the attrition variable was found for effects on related fifth - grade measures, reinforcing the internal validity of the study with respect to all comparisons of the full intervention and control groups.

A limitation of this clinical trial was the rate of attrition through 12 months after discharge, which presents a threat to the internal validity of the study.

The crux of the study ratings is an assessment of the internal validity of the study, that is, the study's potential for establishing that the observed outcomes were caused by the program, rather than other factors.

Efficacy trials concentrate on maintaining the internal validity of the study to demonstrate treatment effects and emphasis is often placed on reducing conditions that might prevent treatment effects from emerging by eliminating more complex subjects (e.g., excluding those exhibiting comorbidity), eliminating more complex families that might not be able to complete or carry out treatment, or including children exhibiting high symptom levels but not meeting diagnostic criteria for the disorder under study.

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.

[17] This is a big problem for internal validity because we are left with the result that parents who refused participation in the Abecedarian program were less willing or able to commit to a long - term early childhood intervention for their children than the overall population of families who were recruited into the study.

A study of the impact of a social program that has high internal validity is designed and analyzed such that there is confidence that the groups being compared differ only in their experience of the treatment program.

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.

Thus, the studies get a grade of B for internal 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 two groups are just.not comparable, how any studies get published on this topic is beyond me, the internal validity of such an analysis just isn't there.

Investigators have used it as the criterion for diagnosis of behavior disturbance against which to gauge the validity of both screening instruments27 and psychological interview measures.28 The published Spanish version of the CBCL used in this study has been found to have good internal consistency and concurrent validity in Spanish - speaking populations.29 The CBCL was chosen as the standard of comparison to avoid basing the calculation of PSC validity on a small subset of the data as done in previous studies using structured interviews as the standard24,30 - 32 and because the CBCL has been widely used as the criterion standard in previous PSC research in both middle - class30, 33 - 35 and low - income minority populations.8

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.

The purpose of this study was to evaluate the following: 1) the construct validity of the Meaning in Life Questionnaire (Steger et al., 2006), Greek Version using different explorative and confirmative factorial analysis approaches like Bifactor EFA, ICM - CFA, Bifactor CFA and ESEM; 2) the measurement invariance of MLQ across gender; 3) the internal consistency reliability of the MLQ; and 4) the convergent and discriminant validity of the MLQ with measures of well - being and mental distress.

More specifically, the objectives of this study are the following: 1) To validate the construct validity of the Meaning in Life Questionnaire (Steger et al., 2006), Greek Version using both exploratory and confirmatory factorial analysis techniques like Bifactor EFA, Bifactor CFA and ESEM; 2) to examine measurement invariance of MLQ across gender; 3) to study the internal consistency reliability of the MLQ; and 4) to evaluate the convergent and discriminant validity of the MLQ with the constructs of well - being, hope, anxiety, depression, stress, hope and resilience.

Previous studies have found TCSQ to have high reliability and validity as a measure of coping style in China.49 50 In this study, Cronbach's α for the total scale was 0.845, and the internal consistency coefficients of the subscales were α = 0.823 (positive coping) and α = 0.863 (negative coping).

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.

Internal validity refers to whether the effects observed in a study are due to the manipulation of the independent variable and not some other factor.

Consequently, the aim of the present study was to 1) examine the psychometric properties of the online administered parental rating of the SDQ in terms of its internal consistency, factor structure, and concurrent validity with another instrument measuring similar constructs, and 2) provide parental norms for the SDQ from a nationwide representative Swedish sample of 10 — 13 year old children.

Knight et al. [65] studied internal consistency and cross-cultural validity of the Child Hostility Scale [66].

Limitations include possible selection bias as no information is provided on the Parents Anonymous ® members who refused to participate in the study, the lack of a control group, and threats to internal validity

to internal validity and design limitations of this community study.

At the same time, there is disagreement in the field about the strength of the evidence on the effectiveness of parent support programs for child outcomes, primarily because of the scarcity of studies with strong internal validity, i.e. reduced bias of different kinds.

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.

In study 3, we tested the internal consistency reliability, split - half reliability and criterion - related validity of the three subscales.

Apart from generating findings on the internal consistency of the scales of positive youth development, life satisfaction, and problem behaviour, the present study further demonstrated the validity of these constructs via confirmatory factor analyses.

Validity studies conducted with independent groups of adolescents indicated high internal consistency (αs =.77 and.88) and test - retest reliability over 1 - and 2 - week intervals (r =.82 and.85, respectively)(Blascovich & Tomaka, 1991).

Several studies have addressed the validity of the parent - reported SDQ in school - aged samples, predominantly confirming the intended 5 - factor structure.5, 6 A 3 - factor configuration of externalizing (conduct problems and hyperactivity), internalizing (emotional and peer problems), and prosocial factors has also been proposed and suggested for use in epidemiologic studies and in low - risk populations.7, 8 The internal reliability of SDQ subscales has been predominantly examined by using Cronbach's α, a measure of the interrelatedness of items; however, α estimates are a lower bound for reliability and is often underestimated.9 A meta - analytic review reported weighted mean α coefficients extracted from 26 studies that showed generally modest reliabilities for parent reports (0.53 < α < 0.76).10 McDonald's ω, which estimates the proportion of a scale measuring a construct, typically yields higher reliability estimates but has rarely been used to assess reliability of the SDQ.

A literature review of 747 studies concluded that the HADS demonstrated good concurrent validity, internal reliability and discriminant validity (Bjelland et al. 2002).

The CSI has shown satisfactory internal consistency (alpha =.69 -.94)[44,45] and good test - retest reliability (r =.67 -.83) in young adults [44] and concurrent validity with other measures of coping [46](this study, alphaengagement =.89, alphadisengagement =.86).

Therefore, the current study aims to test the internal structure and validity of the FEEL - KJ in a large sample of Dutch - speaking Belgian children and adolescents (N = 1102, 8 — 18 years old).

Externalizing and internalizing problems were measured via parent report on the Externalizing and Internalizing subscales of the Behavior Assessment System for Children, Second Edition — Parent Rating Scales (BASC - 2; Reynolds and Kamphaus 2004), used previously to study emotional and behavioral problems in youth with ASD (Volker et al. 2010), and found to have high internal consistency (α = 0.81 — 0.94), test re-test reliability (r =.88 — .91), and moderate to high concurrent validity (r =.53 to.83; Reynolds and Kamphaus 2004).

Study 1 provided initial evidence of reliability and validity for the QPCCE by exploring factorial structure, internal consistency and test - retest reliability.