Estimating latent correlations between repeated testings

A model for longitudinal latent structure analysis is proposed. We assume that test scores for a given mental or attitudinal test are observed for the same individuals at two different points in time. The purpose of the analysis is to fit a model that combines the values of the latent variable at the two time points in a two-dimensional latent density. The correlation coefficient between the two values of the latent variable can then be estimated. The theory and methods are illustrated by a Danish dataset concerning psychic vulnerability.     

A multitrait-multimethod analysis of the preschool behavior questionnaire

The Preschool Behavior Questionnaire is a teacher rating instrument yielding a total score reflecting overall level of adjustment and three subscale scores labeled Hostile/Aggressive, Anxious/Fearful, and Hyperactive/Distractible. This study assessed the convergent and discriminant validity of this teacher rating measure against two alternative measures within a multitrait-multimethod analysis. The results supported the construct validity of the Hostile/Aggressive and Anxious/Fearful scores as well as the overall score. There was, however, no support for the validity of the Hyperactive/Distractible score.This research was supported, in part, by a grant from the Pickering Foundation. The authors would like to thank Maria Bhaneja for her help in the collection and coding of data. Thanks are also extended to the teachers and children who participated in the study.     

Appointed and Elected Leader Responses to Favorableness of Feedback and Level of Task Activity from Followers1

Leader evaluations of four types of followers, providing either positive or negative feedback with either high or low task activity, were studied. Forty-six subjects, 20 female and 26 male, were randomly placed in the appointed or elected conditions of leader legitimacy and told they were leading four same-sex followers in a group problem-solving task. The dependent measure was a score made up of their semantic differential ratings of each follower. A three-way interaction indicated that elected and appointed leaders responded differentially to high and low activity followers under the negative feedback condition, but similarly under the positive feedback condition. In addition, a main effect showed that elected leaders were generally more positive than appointed leaders in judgments of their followers. The results were interpreted within a social exchange perspective on leader-follower relations.     

The reflecting team: dialogue and meta-dialogue in clinical work

A "stuck" system, that is, a family with a problem, needs new ideas in order to broaden its perspectives and its contextual premises. In this approach, a team behind a one-way screen watches and listens to an interviewer's conversation with the family members. The interviewer, with the permission of the family, then asks the team members about their perceptions of what went on in the interview. The family and the interviewer watch and listen to the team discussion. The interviewer then asks the family to comment on what they have heard. This may happen once or several times during an interview. In this article, we will first describe the way we interview the family because the interview is the source from which the reflections flow. We will then describe and exemplify the reflecting team's manner of working and give some guidelines because the process of observation has a tendency to magnify every utterance. Two case examples will be used as illustrations.     

Uncertainty and the orientation reaction

In Experiment I, blurred pictures evoked longer desynchronization than clear pictures but not more intense GSRs. Experiment 2 confirmed that the EEG effect depended on subjective uncertainty by showing that it did not occur when a blurred picture was immediately preceded by a clear version of the same picture.     

Sufficient statistics and latent trait models

For questionnaires with two answer categories, it has been proven in complete generality that if a minimal sufficient statistic exists for the individual parameter and if it is the same statistic for all values of the item parameters, then the raw score (or the number of correct answers) is the minimal sufficient statistic. It follows that the model must by of the Rasch type with logistic item characteristic curves and equal item-discriminating powers.This paper extends these results to multiple choice questionnaires. It is shown that the minimal sufficient statistic for the individual parameter is a function of the so-called score vector. It is also shown that the so-called equidistant scoring is the only scoring of a questionnaire that allows for a real valued sufficient statistic that is independent of the item parameters, if a certain ordering property for the sufficient statistic holds.     

The translation effect in memory search

The function relating recognition reaction time to the size of a memorized set of items is steeper when the memorized items and the probe are in two different categories, related by a memorized translation scheme, than when they are in the same category. Experiment 1 demonstrates that this “translation effect” is obtained for both familiar and unfamiliar translation schemes and further demonstrates that the zero-intercepts of the functions are lower when the probe differs from the memorized items in category than when it does not. Experiment 2 demonstrates that the slopes of the functions relating negative RT to memorized set size when probe and set are the same in category are steeper than the slopes of the corresponding positive functions just in case subjects are aware that the probe and set categories may differ. Experiment 3 demonstrates that the translations between memorized items and a probe that differ in category are done during the rehearsal of the memorized set, not after the probe is presented. Arguments are presented that rehearsal strategy determines memory comparison time, presumably through a hypothetical memory strength variable, but that direct-access strength theories that deny a memory scanning process are inadequate to account for the data.     

Factors affecting the acquisition and elimination of children's donating behavior

Thirty-five 6- to 10-year-old children with initial low rates of donating to help a peer either simply received a fine for each failure to donate (n = 7) or also were informed of the contingency between the fine and failure to donate (n = 28). Explanation of the contingency was necessary to increase children's donation rates. Donations continued at high rates during a gradual, unannounced removal of the fine contingency, but decreased when children were informed that fines were no longer in effect, particularly for children who had failed to donate at least once during training and had actually been fined. Overall, addition of a distraction or an inequity procedure did not reduce donating below rate reductions due to the announced extinction procedure alone.     

Dominance and sex differences in nonverbal responses to differential eye contact

Sixteen male and 16 female subjects were divided into high- and low-dominant groups and assigned to one of two cohorts who either avoided eye contact or maintained a steady gaze. Starting 100 in. apart, subjects were asked to approach the cohort to the point where they felt most comfortable. Dependent measures were personal space, approach rate, reciprocal eye contact, and attitude toward cohort. It was found that high-dominant subjects showed increased proxemic behavior in responding to a direct gaze, while low-dominant subjects showed a decrease. Also men tend to use personal space and approach rate to signal dominance, while women use reciprocal eye contact. Finally, an exception was found to previous findings that positive attitudes are associated with high levels of eye contact. Low-dominant males, but no other groups, respond to direct gaze with a more negative attitude.