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.     

A Lesbian Feminist Subscale for the Feminist Perspectives Scale

In an attempt to increase the breadth offeminist perspectives assessed by the FeministPerspectives Scale (FPS2; Henley, Meng, O'Brien,McCarthy, & Sockloskie, 1998), we developed andpsychometrically evaluated a new subscale that assesses lesbianfeminist attitudes. As do the six other subscales of theFPS2, the Lesbian Feminist subscale includes 10attitudinal and 3 behavioral items. We conducted 3 studies with 287 respondents (58% EuropeanAmerican, 15% Latino, 13% Asian, and 6% AfricanAmerican); 88% were women and most were collegeeducated. Findings from these preliminary psychometricevaluations support the subscale's reliability (Cronbach'salpha = .91) and validity. We offer recommendations forthe scale's use and discuss its potentiallimitations.     

ON THE EFFECTS OF NONCONTINGENT DELIVERY OF DIFFERING MAGNITUDES OF REINFORCEMENT

We conducted a parametric analysis of response suppression associated with different magnitudes of noncontingent reinforcement (NCR). Participants were 5 adults with severe or profound mental retardation who engaged in a manual response that was reinforced on variable-ratio schedules during baseline. Participants were then exposed to NCR via multielement and reversal designs. The fixed-time schedules were kept constant while the magnitude of the reinforcing stimulus was varied across three levels (low, medium, and high). Results showed that high-magnitude NCR schedules produced large and consistent reductions in response rates, medium-magnitude schedules produced less consistent and smaller reductions, and low-magnitude schedules produced little or no effect on responding. These results suggest that (a) NCR affects responding by altering an establishing operation (i.e., attenuating a deprivation state) rather than through extinction, and (b) magnitude of reinforcement is an important variable in determining the effectiveness of NCR.     

Generativity-Stagnation: A Five-Category Model

The main task of generativity–stagnation, Erik Erikson's seventh stage of normative psychosocial development, is to establish and guide the next generation through one's acts of care. Five statuses, or prototypic styles of resolving the issues of this stage, determined using a new, semistructured interview measure, are defined using combinations of (1) an individual's level of involvement, or active concern for the growth of the self and others; and (2) an individual's inclusivity, or scope of caregiving concern. Construct validation efforts sought concurrent validity using two different scale measures of generativity, and discrimination between status profiles using the NEO Personality Inventory and Loevinger's Sentence Completion Test of ego development. Results generally support the new status model and point to areas of conceptual convergence and divergence between this approach and other generativity measures.     

Diurnal Patterns of Unpleasant Mood: Associations with Neuroticism, Depression, and Anxiety

The literature on symptoms of depression has included diurnal changes in mood. The morning-worse pattern is commonly mentioned. This pattern is often associated with endogenous or vegetative symptoms (e.g., weight and appetite loss, loss of pleasure, psychomotor retardation). However, depression researchers have also identified an evening-worse pattern of mood. This pattern is sometimes thought to be associated with milder depressive symptoms, and may characterize chronic dysthymia rather than clinical depression. The present study examines a nonclinical sample to test the hypothesis that an evening-worse diurnal pattern of mood would be associated with trait neuroticism, anxiety, and subclinical depressive symptoms. An experience sampling methodology was employed to assess mood three times a day for 60 consecutive days. This allowed us to calculate a reliable aggregate score for diurnal mood patterns. The evening-worse pattern was associated with many neurotic features, with scores on depression and anxiety measures, and with a cognitive style indicative of hopelessness. Discussion focuses on how an evening-worse diurnal pattern of mood may be indicative of mild subclinical depression, chronic dysthymia, or personality traits associated with negative affectivity.     

Self-Efficacy,Decision-Making,and Stages of Change: An Integrative Model of Physical Exercise1

Exercise has important health benefits but a large proportion of the population is physically inactive. We examined the stages of readiness to exercise and their relationship to self-efficacy, the costs and benefits of exercising, and self-report of physical activity in a sample of Rhode Island worksites. Using a three-step model-building approach, exploratory principal components analyses were followed by an examination of the stages of change model with confirmatory structural equation modeling procedures. The model was then examined with longitudinal data. Confirmatory and longitudinal analyses showed an excellent tit between the model and the data. Results indicated that the costs and benefits of exercise and self-efficacy for exercise were related to physical activity only indirectly, through the mediation of stage of readiness to exercise. Structural modeling fit indices revealed that much of the variation and covariation in physical activity was explained by the model. There is the potential to enhance the impact of exercise interventions, by targeting them so as to address factors related to these different stages of readiness.     

The Body's Response to Processing Emotional Trauma: Linking Verbal Text with Autonomic Activity

ABSTRACT When individuals talk or think about upsetting experiences, different coping and defensive processes are invoked from one minute to the next. Further, some coping strategies are thought to be more effortful and to be associated with greater biological activity than others. The present research sought to identify how the expression of emotions and the use of different psychological defenses were reflected in momentary changes in autonomic nervous system activity while subjects wrote about emotional topics. A new methodology is introduced that links the production of natural written language with autonomic activity on a word-by-word or phrase-by-phrase basis. Using this technique with a sample of 24 subjects who wrote about traumatic experiences, it was found that certain text dimensions are highly related to skin conductance level (SCL) but not heart rate. In general, subjects' SCLs increased when expressing negative emotions and when using denial and the passive voice. SCLs were more likely to drop when subjects used positive emotion words and self-references and at the conclusion of sentences or thought units. Implications for this methodology for understanding psychological defense and physical health are discussed.     

A versatile microcomputer-based multiple-field tachistoscope

A newly introduced microcomputer in its most basic form provides a wide variety of stimulus display capabilities at an extremely low price. Several simple illustrative programs demonstrate its ability to present any number of visual stimuli in sequence and record response latencies, thus duplicating the functions of a multiple-field tachistoscope and associated response-recording instrumentation.     

THE RELATION OF FOOD QUANTITY TO RUMINATION BEHAVIOR

Preliminary work suggested that the quantity of food ingested by retarded individuals who usually ruminated following meals was related to the frequency and duration of ruminating responses. This possible relation was experimentally examined by systematically varying food quantity from regular portions to satiation levels for three retarded individuals who exhibited high levels of ruminating. A clear functional relation of food quantity to ruminating emerged, with satiation procedures producing rapid and large decreases in the relatively high frequencies and durations of ruminating characteristic of baseline food quantity conditions.