APPLICATION OF THE “GENERALIZATION MAP” TO A SELF-CONTROL INTERVENTION WITH SCHOOL-AGED CHILDREN

The assessment of generalization has become a priority of applied behavior analysis. This study provided a thorough assessment of the generality of a comprehensive self-control intervention. This intervention incorporated a number of self-management skills and was designed to increase the math performance of an underachieving student in a regular elementary school classroom. All possible classes of generalization as outlined by Drabman, Hammer, and Rosenbaum (1979) were assessed. An ABAB design with follow-up was used to determine the effectiveness of the intervention for the treated student's math performance in the school setting as well as the degree of generalization across the following untreated dimensions: behavior (disruptiveness); setting (home); subject (classmate); and time period (follow-up). The effective intervention produced: subject, behavior, subject-behavior, setting, subject-setting, behavior-setting, subject-behavior-setting, time, subject-time, setting-time, subject-setting-time, and subject-behavior-setting-time generalization. Generalization was not obtained for behavior-time, subject-behavior-time, and behavior-setting-time generalization. Features of this intervention which may have promoted generalization are discussed.     

Effects of Age on the Generalization and Incubation of Memory in the F344 Rat

Freezing (immobility) in the presence of aversive stimuli is a species-specific behavior that is used as an operational measure of fear. Conditioning of this response to discrete sensory stimuli and environmental context cues has been used as a tool to study the neuropsychology of memory dynamics and their development over the lifespan. Three age groups of F344 rats (3, 9, and 27 month) received tone–foot shock pairing (or tone only) in a distinctive chamber on two consecutive days. Separate subgroups of rats from each age group were then tested, at retention intervals of 1, 20, 40, or 60 days, for context-mediated fear in the environment in which they were trained, for generalization of the fear response to a novel chamber, and for fear of the tone. Beginning at day 20, the 27-month-old rats exhibited less freezing behavior than did younger rats when tested in the conditioning context. This age difference was a result of freezing behavior becoming progressively stronger with time in the two younger age groups, a phenomenon that has been referred to as memory incubation. Incubation of the contextual fear response was not detected in the old rats. In a novel context, all age groups exhibited significantly more freezing than did control animals. There was also pronounced incubation of this generalized freezing response, and the extent of incubation declined significantly with age. In the novel context, the freezing response to the tone was robust in all age groups and increased over time, in constant proportion to the degree of freezing elicited by the novel context itself, prior to tone onset. The fact that old animals are known to be relatively selectively impaired in forms of memory that depend on a functional hippocampus suggests a possible explanation for the reduced incubation effects seen in old rats; however, whether the increased expression of fear over time is mediated by a hippocampal-dependent memory consolidation process or whether it reflects a generalized increase in the gain of the circuitry mediating the fear response itself, remains to be determined.     

Genetic and environmental origins of verbal and performance components of cognitive delay in 2-year-olds.

The authors investigated the etiology of several measures of cognitive delay. Verbal (V) and performance (P) abilities were assessed in over 3,000 pairs of 2-year-old twins. Group-differences heritability for general delay (the lowest 5% of the V and P composite) was 35%. However, V and P delays considered independently showed large differences in group heritability (77% for V vs. 40% for P). Specific delays with comorbid cases eliminated showed an even greater difference in group heritability (78% vs. 22%, respectively). The small sample comorbid for both V and P delay also yielded high group heritability for both V (77%) and P (93%) scores. Shared environmental factors also differed in magnitude for V (20%) and P (41%) delays. Because the genetic and environmental origins of V and P delays in infancy differ, they are better considered separately rather than combined into a composite measure of general cognitive delay.     

Affective individual differences and startle reflex modulation

Potentiation of startle has been demonstrated in experimentally produced aversive emotional states, and clinical reports suggest that potentiated startle may be associated with fear or anxiety. To test the generalizability of startle potentiation across a variety of emotional states as well as its sensitivity to individual differences in fearfulness, the acoustic startle response of 17 high- and 15 low-fear adult subjects was assessed during fear, anger, joy, sadness, pleasant relaxation, and neutral imagery. Startle responses were larger in all aversive affective states than during pleasant imagery. This effect was enhanced among high fear subjects, although followup testing indicated that other affective individual differences (depression and anger) may also be related to increased potentiation of startle in negative affect. Startle latency was reduced during high- rather than low-arousal imagery but was unaffected by emotional valence.     

The analysis of an adult with night terror.

The author discusses the analysis of a woman with night terror, a condition rarely seen in adults. The analysis revealed the pathogenicity of splitting mechanisms which had developed under the influence of an overstimulating environment and exposure to the primal scene, followed by the separation and divorce of the patient's parents.     

The slide projector as a computer-operated visual display

Advantages and method are presented for using the slide projector in a computer-operated visual display system.     

Hierarchically distributed processing for psychology

The advantages of loosely coupled hierarchical computer networks for psychological research are discussed. Hardware methods for interconnecting computers are considered, and software communication protocols are detailed. A hierarchy of interconnected computers is formed: (1) large campus computer for statistical analyses, (2) medium scale computer for data concentration and program development, and (3) laboratory computers for data collection. This hierarchy provides efficient computing at all levels and insures maximum computing power at minimum cost.