When data are collected via anonymous Internet surveys, particularly under conditions of obligatory participation (such as with student samples), data quality can be a concern. However, little guidance exists in the published literature regarding techniques for detecting careless responses. Previously several potential approaches have been…

Jensen has reported reaction-time (RT) studies indicating that various parameters correlate significantly with IQ. Two parameters of interest are slope of RT across set size and increasing correlations of RT with IQ as set size increases. After reviewing these studies, the author concludes that Jensen's claims are unwarranted. (Author/BW)

The author replies to Jensen and Vernon's article and maintains that there is little reason for accepting Jensen's claims, particularly with respect to the major theoretical question. (Author/LMO)

Ruchalla, Schalt, and Vogel (1985) reported a negative correlation between the g-loadness of intelligence subtests and the extent to which the subtests correlated with reaction times. Possible methodological problems with Ruchalla et al. are described, and results of two other studies pertinent to the issue are discussed. (Author/LMO)

Three experiments examined what happens to reaction time to verify easy items when they are mixed with difficult items in a verification task. Subjects verification of simple arithmetic equations and sentences took longer when placed in a difficult list. Difficult sentences also slowed the verification of easy arithmetic equations. (Author/RD)

A study of the factors influencing response rates in survey research--including kind of instrument used and personality and job characteristics of those surveyed--examined response rates to a mailed questionnaire in a sample of vocational-technical teachers and their program directors. Offers suggestions on improving response rates in…

This paper examines Longstreth's criticisms of Jensen's studies relating reaction-time to measures of intelligence and finds them unconvincing. While Longstreth raises some interesting questions, the authors found no evidence in the data for practice or order effects in a reaction-time paradigm. (BS)

Four points are made in regard to the controversial reaction times studies: (1) apparatus used is not the best; (2) practice effects have not been thoroughly accounted for; (3) there is some evidence that simple reactions are different from choice ones; and (4) basic data to be explained are those which show substantial group differences.…

Longstreth's critique of Jensen's research on the relationship of IQ to individual differences in visual reaction time (RT), measured in the Hick paradigm, is said to have numerous errors of fact and interpretation, some trivial and some of theoretical importance. (Author/LMO)

Questionnaires were mailed to a sample of 1,980 non-returning, non-occupational students who had been enrolled at Cerritos College during spring 1976 but did not return in fall 1976, in order to test the applicability of the California community college Student Accountability Model (SAM), a statewide follow-up system for occupational students, to…