Sex role development and teenage fertility-related behavior

Data from a 1975 survey of 369 females and 325 males aged 16-17 were analyzed to shed light on the relationship between the maturity of adolescent women and their sexual behavior and contraceptive practice. A straightforward decision-making process was found among males, but more complicated influences exist for females. When the data were submitted to regression and chi-squared analyses, it was found that whereas sexually active adolescents had more liberal sexual attitudes than virgins, their sex role attitudes were more stereotypical than virgins. Then the 2 groups were subdivided into virgins who did not intend to have premarital intercourse (20%); virgins who planned or considered premarital intercourse (40%); adolescents who experienced intercourse prior to age 16 (20%); and those who experienced intercourse after age 16 (20%). It was found that the virgins who did not intend to have premarital intercourse held the most stereotypical sex role attitudes, followed by sexually active women, and that virgins planning or considering intercourse held the least stereotypical views of all. It is suggested that this occurred because these adolescents were more mature and had resolved sexual identity problems earlier without resorting to intercourse. Birth control use was found to be more effective among the adolescents who experienced intercourse after age 16. Further studies are underway to test the hypotheses that the more mature a woman is when she experiences intercourse, the more likely it is that her development will be enhanced and that her contraceptive behavior will be effective.     

Learning when reward is delayed: a marking hypothesis

Rats were trained on spatial discriminations in which reward was delayed for 1 min. Experiment 1 tested Lett's hypothesis that responses made in the home cage during the delay interval are less likely to interfere with learning than responses made in the maze. Experimental subjects were transferred to their home cages during the delay interval, and control subjects were picked up but then immediately replaced in the maze. Contrary to Lett's hypothesis, both groups learned. Further experiments suggested that handling following a choice response was the crucial variable in producing learning: No learning occurred when handling was delayed (Experiment 2) or omitted (Experiment 3). One possible explanation for the fact that handling facilitated learning is that it served to mark the preceding choice response in memory so that subjects were then more likely to recall it when subsequently reinforced. In accordance with this interpretation, learning was found to be just as strong when the choice response was followed by an intense light or noise as by handling (Experiment 4). The implication of marking for other phenomena such as avoidance, quasi-reinforcement, and the paradoxical effects of punishment is also discussed.     

A hot new way to measure aggression: Hot sauce allocation

Laboratory experiments investigating aggressive behavior have operationalized and assessed aggression in a variety of ways; however, these measures are often problematic because they do not create a situation in which participants perceive potential for real harm to come to the target, there is a risk of actual harm to the target, or they are too familiar to participants. To overcome these limitations, we developed a new method for measuring aggression, specifically, the amount of hot sauce administered to a target known to dislike spicy foods. We summarize a series of experiments assessing theory‐based hypotheses regarding aggression in which this measure is employed. We then briefly consider the strengths and limitations of this new measure. Aggr. Behav. 25:331–348, 1999. © 1999 Wiley‐Liss, Inc.     

Mental health assessment of infants,toddlers, and preschoolers in a service program and a treatment outcome research program

This article describes the mental health assessment in preparation for treatment conducted in two University-based clinical programs that offer dyadic child-parent psychotherapy as the treatment modality. The Infant-Parent Program is a mental health program serving children between birth and 3 years of age and their families when the parent-child relationship is jeopardized by risk factors in the parent, child, or family circumstances. The Child Trauma Research Project is an intervention outcome research program serving preschool- aged children and their mothers when the child witnessed domestic violence. The programs share a similar assessment approach emphasizing the importance of a working alliance, spontaneous parental reports, and observation of child-parent interaction in a variety of settings. However, their different functions in terms of clinical service and research dictate appropriate modifications in their respective assessment procedures. The two assessment protocols and their rationale will be described in the context of the clinical and research goals of the programs. © 1997 Michigan Association for Infant Mental Health     

The roles of sequencing and verbal working memory in sentence comprehension deficits in Parkinson's disease

Studies of sentence comprehension deficits in Parkinson's disease (PD) patients suggest that language processing involves circuits connecting subcortical and cortical regions. Anatomically segregated neural circuits appear to support different cognitive and motor functions. To investigate which functions are implicated in PD comprehension deficits, we tested comprehension, verbal working memory span, and cognitive set-switching in a non-linguistic task in 41 PD patients; we also obtained speech measurements reflecting motor sequencing processes that may be involved in articulatory rehearsal within working memory. Comprehension of sentences with center-embedded or final relative clauses was impaired when they could not be understood from lexical semantic content alone. Overall comprehension error rates correlated strongly with impaired set-switching and significantly with reduced working memory span and speech motor sequencing deficits. Correlations with comprehension of different sentence structures indicate that these impairments do not represent a single deficit; rather, PD comprehension deficits appear to arise from several independent mechanisms. Deficits in cognitive set-switching or underlying inhibitory processes may compromise the ability to process relative clauses. Deficits in verbal working memory appear to impair comprehension of long-distance dependencies. Speech sequencing correlated with neither set-switching nor verbal working memory span, consistent with their being supported by independent, segregated cortico-subcortical circuits.     

Why introverts can't always tell who likes them: multitasking and nonverbal decoding

Despite personality theories suggesting that extraversion correlates with social skill, most studies have not found a positive correlation between extraversion and nonverbal decoding. The authors propose that introverts are less able to multitask and thus are poorer at nonverbal decoding, but only when it is a secondary task. Prior research has uniformly extracted the nonverbal decoding from its multitasking context and, consequently, never tested this hypothesis. In Studies 1-3, introverts exhibited a nonverbal decoding deficit, relative to extraverts, but only when decoding was a secondary rather than a primary task within a multitasking context. In Study 4, extraversion was found to correlate with central executive efficiency (r = .42) but not with storage capacity (r = .04). These results are discussed in terms of arousal theories of extraversion and the role of catecholamines (dopamine and norepinephrine) in prefrontal function.     

Psychological characteristics of people with Parkinson's disease who prematurely drop out of professionally led Internet chat support groups.

Researchers of Internet health interventions have begun to address the problems of high attrition rates. Attrition has been a problem for psychosocial interventions for nearly 50 years. It is ubiquitous no matter what the type of intervention or the modality of delivery. Consistent are the repeated findings that demographic characteristics are the most robust variables. We tested the hypothesis that the greater the fear and apprehension experienced in professionally led Internet support groups, the more likely the participants would not complete the 25-week intervention. The sample consisted of 66 people with Parkinson's disease; each participant was assigned to one of six chat groups. To assess psychological states, we used PCAD, a text analysis program analyzing each person's postings during each chat room session. There was a statistically significant difference between those who terminated the group early and those who completed the intervention on the Anxiety-Fear dimension, F=2.35, (6,63), p=0.03. People who dropped out demonstrated higher death and shame anxiety. A number of possible designs for online groups that may reduce premature attrition are discussed.     

Functional magnetic resonance imaging responses relate to differences in real-world social experience

Although neuroimaging techniques have proven powerful in assessing neural responses, little is known about whether scanner-based neural activity relates to real-world psychological experience. A joint functional magnetic resonance imaging (fMRI)/experience-sampling study investigated whether individual differences in neurocognitive reactivity to scanner-based social rejection related to: (a) moment-to-moment feelings of social rejection during real-world social interactions ("momentary social distress") and (b) the extent to which these momentary feelings corresponded with end-of-day global assessments of social disconnection ("end-of-day social disconnection"). Individuals who showed greater activity in regions associated with affective and pain processing (dorsal anterior cingulate cortex, amygdala, periaqueductal gray) during scanner-based social rejection reported feeling greater momentary social distress during their daily social interactions. In contrast, individuals who showed greater activity in regions associated with memory and self-referential memory encoding (hippocampus, medial prefrontal cortex) showed a stronger correspondence between momentary social distress and end-of-day social disconnection, such that greater momentary social distress was associated with greater end-of-day social disconnection. These findings complement previous work showing a dissociation between momentary and retrospective reports of affect and suggest that these processes rely on dissociable neural systems.