Biomedical subjects

M E Tota

Publications and source records attributed to M E Tota.

3 recordsLinked to original sources

PubMed1990

Conversational time patterns and mutual influence in parent-child interactions: a time series approach.

Mutual influencing processes are assumed to be the basic building blocks in establishing parent-child bonding and in influencing cognitive and language behavior. A study by Jasnow and Feldstein (1986) revealed that, within the temporal domain of speech, preverbal (9-month-old) infants and their mothers exhibit a pattern of mutual influence (attunement) in their average durations of switching pauses. The general purpose of this research was to extend those findings to children with higher verbal functioning. In addition, parent and child genders, nature of the interaction, and specific aspects of parents' personalities, expressiveness, and instrumentality were considered. Each parent interacted with their 4- or 5-year-old son or daughter in each of two conversations--unstructured (social conversation) and structured (task activity). Conversations were processed by an automated computer system yielding objective measure of turns, vocalizations, pauses, and switching-pause durations. To examine interspeaker influence of attunement of temporal speech patterns, "influence coefficients" were computer for each speaker on a "turn-by-turn" basis using time series regression. Analysis of these coefficients revealed that: (1) Mutual influence is most evident with switching-pause duration. (2) Structure in the conversation (as defined by the task or parental instrumentality) seems to facilitate attunement for vocalization and switching pause duration. (3) Attunement with girls seems to occur equally well with both parents, while boys exhibit a style of temporal patterning influence which suggests greater identification with the father. (4) Expressiveness seems to facilitate attunement to the child's switching-pause duration.

Adult↗

PubMed1990

Alternative reinforcement increases resistance to change: Pavlovian or operant contingencies?

Two multiple-schedule experiments with pigeons examined the effect of adding food reinforcement from an alternative source on the resistance of the reinforced response (target response) to the decremental effects of satiation and extinction. In Experiment 1, key pecks were reinforced by food in two components according to variable-interval schedules and, in some conditions, food was delivered according to variable-time schedules in one of the components. The rate of key pecking in a component was negatively related to the proportion of reinforcers from the alternative (variable-time) source. Resistance to satiation and extinction, in contrast, was positively related to the overall rate of reinforcement in the component. Experiment 2 was conceptually similar except that the alternative reinforcers were contingent on a specific concurrent response. Again, the rate of the target response varied as a function of its relative reinforcement, but its resistance to satiation and extinction varied directly with the overall rate of reinforcement in the component stimulus regardless of its relative reinforcement. Together the results of the two experiments suggest that the relative reinforcement of a response (the operant contingency) determines its rate, whereas the stimulus-reinforcement contingency (a Pavlovian contingency) determines its resistance to change.

Animals↗

PubMed1988

Context-dependent automatic processing in depression: accessibility of negative constructs with regard to self but not others.

The existence of automatic negative self-referential thought in depression was examined by using the concurrent memory load paradigm. Depressed and nondepressed subjects judged each of a series of depressed- and nondepressed-content adjectives as to its descriptiveness of the self or of the average other person. While making each judgment, some subjects held six digits in working memory, whereas the remaining subjects had no concurrent memory load. We found that the memory load manipulation resulted in a reliably smaller increase in depressed subjects' self-referential judgment latencies for depressed content than for nondepressed content, with the reverse being true of nondepressed subjects. For all subjects, however, the load effect on other-referential judgment latencies was smaller for nondepressed-content adjectives than for depressed-content adjectives. The results suggest an automatic, unintentional component in the depressed person's use of negative social constructs in self-perception but not in other-perception, indicating a context-dependent form of automatic processing.

Adult↗