Unavoidable sample size issues beset psychological research that involves scarce populations or costly laboratory procedures. When incorporating longitudinal designs these samples are further reduced by traditional modeling techniques, which perform listwise deletion for any instance of missing data. Moreover, these techniques are limited in their…

As the US continues to diversify, methods for accurately assessing human behavior must evolve. This paper offers multicultural research considerations at several stages of the research process for psychological research and consultation. Implications regarding the comparative research framework are discussed and suggestions are offered on how to…

This paper presents a non-parametric imputation technique, named random forest, from the machine learning field. The random forest procedure has two main tuning parameters: the number of trees grown in the prediction and the number of predictors used. Fifty experimental conditions were created in the imputation procedure, with different…

In decisions from experience, there are 2 experimental paradigms: sampling and repeated-choice. In the sampling paradigm, participants sample between 2 options as many times as they want (i.e., the stopping point is variable), observe the outcome with no real consequences each time, and finally select 1 of the 2 options that cause them to earn or…

Across many areas of psychology, concordance is commonly used to measure the (intragroup) agreement in ranking a number of items by a group of judges. Sometimes, however, the judges come from multiple groups, and in those situations, the interest is to measure the concordance between groups, under the assumption that there is some within-group…

Directions are provided for the construction of a reduced size Rod and Frame Test. Simpler and less expensive, the proposed apparatus has criterion validity parallel to that of the full-sized. (GS)

Contrasts modeling methods in control theory to the methods of statistical generalizations in empirical studies of human or animal behavior. Presents a computer simulation that predicts behavior based on variables (effort and rewards) determined by the invariable (desired reward). Argues that control theory methods better reflect relationships to…

Dutch and Belgian immigrants in California have a high rate of unresolved attachment status compared to nonimmigrant Californians, unrelated to their length of time in the United States, to their marriage status, or to their reasons for immigration. In this study, the author analyzes attachment at the representational level by comparing coherence…

The concept of control is fundamental to comparative research. In research designs where randomization of observational units is not possible, control has been exercised statistically from a single covariate by a process of residualization. The alternative, known as subclassification on the propensity score, was developed primarily for…

Discusses theoretical and methodological problems relating to the comparison of test results of individuals and groups with differing cultural backgrounds. Develops a statistic by which deviance of score patterns can be quantified and which indicates whether a person's score can be compared with the scores in a specific group. (Author/GC)

The purpose of this study was to replicate and extend previous gender difference research by identifying differences in value priorities. College graduates were given the Rokeach Value Survey as part of their testing prior to graduation in the spring of 1989, 1990, and 1991. Using the Mann-Whitney U statistic, significant differences between the…

The effects of two social contexts on the risk -taking behavior of elementary boys on a shuffleboard task were investigated. It was predicted that Atkinson's motive-probability-incentive (M-P-I) model would be supported in the peer-competitive context, in that the success-oriented subjects would choose more goals with median Ps values than the…

Investigates the reading-writing relationship, emphasizing theories postulating identicality of knowledge use. Administered four reading measures and eight writing measures to second and fifth graders and found few correlations between reading and writing variables. Suggests little improvement arises from combining reading and writing or from…

Data from an outpatient treatment trial for anorexia nervosa were examined to gain preliminary insights as to whether the modified Stroop colour-naming task might offer a useful measure of treatment outcome. It was hypothesised that interference for eating-, weight- and shape-related words on a modified version on the Stroop colour-naming task…

The possibilities of influence of the race of testers on the intellectual performance of children were investigated. A four factorial design, with two response measures--the digit span and block design subtests of the Wechsler Intelligence Scale for Children--was employed. These data were gathered on students enrolled in a black and white…