Modality-repetition and attentional effects on reflex blinking in infants and adults

The ability of a brief prepulse to inhibit reflexively elicited startle is a robust phenomenon in adults of several species but is weak or absent in infants. The possibility that afferent processing of the prepulse is inadequate in infants was tested by assessing the integrity of two other types of reflex modulation that occur in modality-specific paths, that is, attenuation by repetition of same-modality stimuli and enhancement by modality-selective attention. The reflex, measured by electromyographic activity of the muscle controlling blink, was elicited by intense light flashes or noise bursts preceded by brief acoustic or visual prepulses and delivered during attention-directing acoustic or visual foregrounds that evoked cardiac deceleration. Modality-repetition effects were evidenced by smaller peak blink magnitude and longer latency of blinking to same than to different modality pairs and did not differ as a function of age (4-month-old infants or college students). Attention effects were also seen in both infants and adults and, in accord with previous findings, were evident in magnitude for infants and latency for adults. Thus, immaturity in paths mediating these effects could not explain delayed development of prepulse inhibition. Other possibilities include delayed maturation of extrinsic inhibition or of transient-processing systems.     

Sex-role messages vis-à-vis microcomputer use: A look at the pictures

This study explored the pictoral representation of men, women, boys, and girls in popular computer magazines through content analysis. Issues of three mass market computer magazines (total pages =2,637) were analyzed to determine numbers of men, women, boys, and girls illustrated; roles in which they were portrayed; and whether they were shown using the computer actively, standing by while others used the computer, or rejecting the computer. Many stereotypic portrayals were found: Men appeared in illustrations almost twice as often as women; women were overrepresented as clerical workers and sex objects, while men were overrepresented as managers, experts, and repair technicians. Women were shown significantly more often in a passive role vis-à-vis computers. In mixed-sex illustrations, men were most often shown in the position of authority. Only women were shown rejecting the computer or portrayed as sex objects. Also included are observations regarding the effects of stereotypic portrayals on women/girls and suggestions for further research.     

Intrapersonal Emotion Regulation Difficulties and Maladaptive Interpersonal Behavior in Adolescence

Research on Child and Adolescent Psychopathology - Although most research conceptualizes emotion regulation as an internal process (i.e., intrapersonal), emotions are frequently regulated in an...     

Personality-based latent classes of posttraumatic psychopathology: personality disorders and the internalizing/externalizing model

Prior research using the Brief Form of the Multidimensional Personality Questionnaire (MPQ-BF; Patrick, Curtin, & Tellegen, 2002) has shown evidence of 3 temperament-based subtypes--termed internalizing, externalizing, and simple PTSD--among individuals with symptoms of posttraumatic stress disorder (PTSD; Miller, Greif, & Smith, 2003). This study sought to replicate and extend research in this area by conducting a latent profile analysis of higher order temperament scales from the MPQ-BF using a new sample of 208 veterans with symptoms of PTSD. Results suggest that a 3-class solution reflecting internalizing, externalizing, and simple subtypes of posttraumatic psychopathology provided the best fit to the data. The externalizing subtype was characterized by features of antisocial, borderline, histrionic, and narcissistic personality disorders on the International Personality Disorder Examination (Loranger, 1999) as well as low levels of constraint and high levels of negative emotionality on the MPQ-BF. In contrast, individuals in the internalizing class exhibited features of schizoid and avoidant personality disorders, low levels of positive emotionality, and high levels of negative emotionality. The simple subtype was defined by low levels of comorbid personality disorder features and relatively normal personality profiles. Findings support the reliability of this typology and support the relevance of the internalizing and externalizing model to the structure of personality disorders.