The data was gathered using multiple non-invasive brain imaging measures from 210 people in the NIH Human Connectome Project, and the accuracy of the resulting map was confirmed on another group of 210 people.
The field data were gathered using the CR 5,000 measurement and control system manufactured by Campbell Scientific , Inc
The qualitative data were gathered using informant interviews with key duty bearers at district, sub-county, parish, and village levels.
Other strengths were that the self-reported data were gathered using a standardized procedure [ 61], and the use of validated/well known-instruments [ 28, 49, 61, 64- 66, 73] A limitation of the study was the relatively low statistical power of the analyses of the discordant twin pairs, especially when stratified for zygosity.
To describe the strengths and weaknesses of the e-assessment and the e-training program, qualitative data were gathered using semi-structured interviews together with a study-specific questionnaire.
Student data were gathered using the New Standards Reference Examination (NSRE, for discussion of the exam see Briars and Resnick 2000; Wiley and Resnick 1997), published by Harcourt Educational Measurement (1996, 1997, 1998, 1999),2 and the Elementary Mathematics Attitude Survey (EMAS; Wilkins, 2004a).
Data were gathered using the Technological Pedagogical Content Knowledge (TPACK) model and the Teacher Beliefs and Intentions questionnaire using a pre post test-design.
Past 90-day drug and alcohol use data were gathered using the timeline followback (TLFB) method (Sobell & Sobell, 1996).
