Related Experiment Video
Updated: May 3, 2026

Qualitative and Quantitative Validation of Tools with Rating Scales Aimed at Assessing the Quality of University Service-Learning
Published on: August 29, 2025
An Exploratory Factor Analysis of the Knowledge of Evidence-Based Services Questionnaire
Kelsie H Okamura1, Brad J Nakamura2, Charles Mueller2
1Department of Psychology, University of Hawaii at Manoa, 2530 Dole Street, Sakamaki C-400, Honolulu, HI, 96822, USA. kelsieo@hawaii.edu.
Abstract:
Recent developments for disseminating and implementing evidence-based practices (EBPs) have emphasized the importance of increasing therapists' knowledge of such techniques. However, systematic efforts to measure knowledge in therapists serving youth have mostly relied on poorly researched study-specific measures. This study investigated the structure of EBP knowledge in a large sample of youth community therapists (N = 240) via a therapist report instrument emphasizing therapeutic commonalities across various types of treatment approaches. Findings supported a three-factor structure of knowledge with scores on factors varying by therapists' primary practice setting and education level. The relationships between therapist knowledge of and attitudes towards EBPs are also discussed.
Related Concept Videos
Factorial Design
Cross-Sectional Research
Reliability and Validity
Observational Studies
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One...
Systematic Error: Methodological and Sampling Errors
Sampling errors originate from improper sampling methods or the wrong sample population. These errors can be minimized by refining the sampling strategy. Defective instruments or faulty calibrations are the sources of instrumental...
Study Designs in Epidemiology
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...

