T M Gehring

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We developed a mean field, metapopulation model to study the consequences of habitat destruction on a predator-prey interaction. The model complements and extends earlier work published by Bascompte and Solé (1998, J. theor. Biol.195, 383-393) in that it also permits use of alternative prey (i.e., resource supplementation) by predators. The current model is(More)
Adolescents' perceptions of family relationships were studied using the FAST, a spatial technique in which wooden figures were placed on a board to represent cohesion and power. 150 subjects, drawn equally from sixth, ninth, and twelfth grades, portrayed the family in 2 representations: as perceived typically and ideally. Father-mother, father-child, and(More)
Perceptions of family cohesion and hierarchy structures were assessed by the Family System Test (FAST), a clinically-derived figure placement technique. Parents (N = 140) and their preadolescent offspring (N = 70) completed typical and conflict representations in individual as well as group settings. Typical representations were characterized by balanced(More)
Nonclinical respondents and psychiatric outpatients (N = 400) between the first and twelfth grades portrayed their families as they perceived them in typical and in conflict situations using the Family System Test (FAST), a figure placement technique that focuses on cohesion and hierarchy in the family. Results showed that typical representations were(More)
On the basis of the Family System Test (FAST), family representations of parents with healthy and biopsychosocially distressed children were compared, and family structure changes in the context of interventions on the parent-level were described. Results indicated that parental family constructs are related to offspring's health and clinical intervention.(More)
Psychiatric outpatients (N = 72) and nonclinical children (N = 72) from 1st to 12th grades portrayed their families as they wished they were (ideal representation), using the Family System Test (FAST), a figure placement technique that focuses on cohesion and hierarchy. Results showed that constructs of ideal family relations were related to age group (1st(More)
The Family System Test (FAST) is a clinically-derived figure placement technique designed for a three-dimensional representation of cohesion and power in the family. The FAST measures individual and group perceptions in typical, ideal and conflict situations. The flexibility of family structures is assessed by comparing representations of these situations.(More)