An anatomically constrained, stochastic model of eye movement control in reading

This article presents SERIF, a new model of eye movement control in reading that integrates an established stochastic model of saccade latencies (LATER; R. H. S. Carpenter, 1981) with a fundamental anatomical constraint on reading: the vertically split fovea and the initial projection of information in either visual field to the contralateral hemisphere. The novel features of the model are its simulation of saccade latencies as a race between two stochastic rise-to-threshold LATER units and its probabilistic selection of the target for the next saccade. The model generates simulated eye movement behavior that exhibits important characteristics of actual eye movements made during reading; specifically, simulations produce realistic saccade target distributions and replicate a number of critical reading phenomena, including the effects of word frequency on fixation durations, the inverted optimal viewing position effect, the trade-off between first and second fixation durations of refixated words, and the dependence of parafoveal preview benefit on eccentricity.     

Does comorbid attention-deficit/hyperactivity disorder impact the clinical expression of pediatric obsessive-compulsive disorder?

What is the impact of attention-deficit/hyperactivity disorder (ADHD) on the phenotypic expression of pediatric obsessive-compulsive disorder (OCD). We examined phenotypic features, and functional and clinical correlates in youths with OCD, with and without comorbid ADHD, from a large sample of consecutively referred pediatric psychiatry patients. Although comorbid ADHD had no meaningful impact on the phenotypic expression or clinical correlates of OCD, it was associated with higher rates of compromised educational functioning compared with other OCD youths. Our findings suggest that the OCD phenotype runs true and is not impacted by comorbid ADHD in youths diagnosed with both OCD and ADHD. In such affected youths, both disorders contribute to morbid dysfunction and require treatment. More work is needed to determine whether OCD plus ADHD represents a developmentally and etiologically distinct form of the OCD syndrome.     

An analysis of response,direction, and place learning in an open field and T maze

Rats were trained to locate food in a response, direction, or place problem on an open field located at 2 positions. In Experiment 1, both the response and direction groups solved the problem. The place group failed to solve the task in approximately 300 trials. Experiment 2 demonstrated that rats need distinguishable start points to solve a place problem when neither a response nor a direction solution is available. Findings from Experiment 3 suggest that a combination of path traveled and distinct cues help to differentiate start points. Experiment 4 replicated the findings using a T maze. These results suggest "place" solutions are difficult for rats. The data are discussed with respect to conditional learning and modern spatial mapping theory.     

The impact of neuroticism upon married bipolar patients

The NEO Personality Inventory was given to 33 married patients with bipolar disorder. Consistent with previous findings, patients with bipolar disorder did not show an abnormal personality profile as a group. Extremely wide variation on all scales indicated that the group profile tells little about individual patients. Trait neuroticism robustly predicted psychiatric symptoms at entry to the study when assessed retrospectively for the two years prior to entry and when averaged over a year of treatment. Neuroticism also negatively predicted the self-confidence of the patients in this sample. The patients identified as outliers on neuroticism form a clinically difficult group for whom the distinction between Axes I and II appears to be less meaningful.     

Intergroup contact between professional groups: Two evaluation studies

We report two studies which evaluate practically-oriented programmes of interprofessional contact involving doctors and social workers. The evaluation is based on the ‘contact hypothesis’ in intergroup relations, and highlights four sets of dependent measures: background perceptions, ingroup and outgroup ratings, knowledge, and judgements about work with outgroup partners and experienced contact. Consistent with the contact hypothesis, both studies revealed an improvement in outgroup attitudes, evidence of mutual intergroup differentiation (acknowledged superiority of ingroup and outgroup on independent dimensions), and increased outgroup knowledge. Greater change in Study 2 is interpreted in terms of its longer duration, and the opportunity it provided for contact with multiple outgroup members, compared with a single outgroup partner in Study 1. These findings from field studies are consistent with results from published laboratory experiments.     

The computer and eye processing pictures: The implementation of a raster graphics device

The process of solving visual analogies was examined using a digital video display and video-based eye tracker. The results indicated that increasing the complexity of an analogy by increasing the number of relations involved in the problem resulted primarily in increasing the time it takes to discover the mapping between the two members of the first pair. The display of the picture and the analysis of the eye fixations are described.     

Reliability of the Matching Familiar Figures Test scores of learning disabled children.

The reliability of the Matching Familiar Figures Test with impulsive learning disabled boys was investigated. 20 children were tested in two sessions separated by a 2-mo. period. Significant correlations for response time and errors scores indicated a high level of stability over time. Educational implications were discussed.     

Psychological and Socio-cultural Adjustment during Cross-cultural Transitions: A Comparison of Secondary Students Overseas and at Home

The study further explores the distinction of psychological and socio-cultural adjustment during cross-cultural transitions. One hundred and seventy-eight New Zealand American Field Service (AFS) students residing in 23 different countries completed questionnaires which contained assessments of the following: Personality (extraversion and locus of control); life changes (Social Readjustment Rating Questionnaire); homesickness, cultural distance, acculturation (cultural identity and cultural integration—separation); attitudes toward host country; language ability; amount of contact with host and co-nationals; relationship satisfaction with co-nationals, host nationals and host family; and outcome measures of socio-cultural (social difficulty) and psychological adjustment (Profile of Mood States). Stepwise regressions revealed that homesickness, external locus of control, life changes, and social difficulty accounted for 55% of the variance in psychological adjustment. In contrast, cultural distance, language ability, satisfaction with host national contact, cultural separation and mood disturbance explained 52% of the variance in socio-cultural adaptation. In the second part of the research, psychological and socio-cultural adjustment of AFS students was compared with a sample of 142 home-based New Zealand secondary school students. Although there were no significant differences in psychological adjustment between the two groups, the students who were resident abroad experienced greater socio-cultural difficulties than the students resident in New Zealand (P < 0.0005), and, as hypothesized, the correlation between psychological and socio-cultural adjustment was significantly greater in the home-based students compared to the AFS group (P < 0.0001).