Sociocultural characteristics of pregnant and nonpregnant adolescents of low socioeconomic status: a comparative study

The objective of this study was to compare the sociocultural characteristics of pregnant adolescents of low SES with a nonpregnant adolescent group from the same area of Santiago, Chile. The sample was composed of 229 adolescents, 129 of whom were pregnant for the first time (group A), and 100 who were not pregnant (group B). Each pregnant girl was matched with a nonpregnant girl of the same age and from the same neighborhood. Several differences between the groups were found. Group A had less schooling, a lower level of aspirations, and tended to live in "the present." In addition, norms of behavior were more permissive, they did not practice any religion, and their peer group had more liberal attitudes. The importance of breaking these patterns in order to prevent adolescent pregnancy is discussed.     

Interaction between mother and pre-term infant at 34 weeks post-conceptional age

The impact of premature birth and perinatal medical status on early mother–infant interaction was assessed in 75 dyads with pre-term infants divided into three groups. Infants' gestational age at birth and need for neonatal intensive care intervention differentiated the groups: group 1, 23–31 weeks with intensive care; group 2, 32–35 weeks with intensive care; group 3, 32–35 weeks with no intensive care. The methodological approach was based on observations of the dyads performed when the infant reached a post. conceptional age of 34 weeks (4 weeks before estimated due date of delivery). The observations were conducted in the neonatal nursery during cleaning, face-to-face and feeding interactions. Significant group differences were found in infant distress, maternal sensitivity to the infant and dyadic behaviours of positive interaction. Group 1 dyads showed higher scores or more desirable performance than dyads of group 3. Group 2 dyads usually achieved intermediate scores and performed better than dyads of group 3, especially during the feeding situation. We suggest that, in addition to a possible emergence of maternal compensatory mechanisms in the higher-risk groups, the amount of dyadic experience after birth affects the quality of mother–infant interaction at this early stage.     

The relevance of infant observation to clinical training and practice: An interpretation

In this paper, I discuss the effects of infant observation on the observer and the implications for mental health professionals. Similarities and differences between two Infant Observation Seminar groups of students are presented. Students performed in-home observations once a week over a 2-year period. Initially, there were motivational differences between the groups of students. One group had members committed to an intensive training program in psychoanalytic psychotherapy with children (Training Group), and the other group was a service delivery front-line worker group whose members voluntarily attended a weekly in-service training seminar (Work Group). In addition to infant observation, the Training Group had ongoing didactic seminars in psychoanalytic theory, 3 hours weekly for 4 years. The Work Group had a didactic seminar on some aspect of relevant infancy literature or psychoanalytic theory for 1 hour per week for the duration of the seminar, which was 2 years. The findings suggest that mental health workers can enhance their clinical skills through infant observation, that they can obtain a working knowledge of infant development, that prior training did not affect observation, and that all observers had difficulty observing mother-infant relationships due to counter-transference difficulties that involved unresolved conflicts from the past.     

Number of options in a movement sequence affects learners' behavior in a self-controlled practice condition

Self-controlling practice implies a process of decision making, which suggests that the options in a self-controlled practice condition could affect learners. The number of task components with no fixed position in a movement sequence may affect the way learners self-control their practice. A 200-cm coincident timing track with 90 light-emitting diodes (LEDs)--the first and the last LEDs being the warning and the target lights, respectively--was set so that the apparent speed of the light along the track was 1.33 m/sec. Participants were required to touch six sensors sequentially, the last one coincidently with the lighting of the target light (timing task). Group 1 (n = 55) had only one constraint, and were instructed to touch the sensors in any order, except for the last sensor which had to be the one positioned close to the target light. Group 2 (n = 53) had three constraints: the first two and the last sensor to be touched. Both groups practiced the task until timing error was less than 30 msec. on three consecutive trials. There were no statistically significant differences between groups in the number of trials needed to reach the performance criterion, but (a) participants in Group 2 created fewer sequences compared to Group 1, and (b) were more likely to use the same sequence throughout the learning process. The number of options for a movement sequence affected the way learners self-controlled their practice, but had no effect on the amount of practice to reach criterion performance.     

Expressive timing and interactional synchrony between mothers and infants: cultural similarities, cultural differences, and the immigration experience

The spontaneous vocal interactions of 30 mothers and their 2- to 5-month-old infants from India, France, and the United States were analyzed using an acoustic analysis method. Similarities and differences in vocal interactional patterns were highlighted between the three groups. On the one hand, in the three cultural contexts mother–infant vocal interaction was found to be organized around hierarchical temporal intervals of the same approximate length, had the same balance between regular rhythm and variation (“expressive timing”), and manifested the same coordination between mother and infant vocalization (“interactional synchrony”). On the other hand, the three groups also revealed cultural variability. The Indian mothers had more togetherness with their babies, as indexed by less space between vocal turns and more overlap of mother and baby vocalizations. They also produced a higher ratio of nonverbal to verbal vocalizations. The spontaneous vocal interactions of a group of 30 Indian immigrant dyads were also studied. With respect to culturally variable characteristics, the vocal interaction of immigrant dyads living in the United States showed signs of change in the direction of the host culture. With respect to characteristics shared by all three nonimmigrant groups, the immigrant dyads showed lower levels of expressive timing and interactional synchrony than the nonimmigrant group as a whole.     

Mother–infant communication can be enhanced after conception by in‐vitro fertilization

To determine if stress associated with artificial pregnancy treatment might affect early communication, video microanalysis was applied to examine face‐to‐face play between infants and their mothers in the first 5 months. Three groups of infants participated: 8 born after in‐vitro fertilization (IVF) treatment employing parental gametes; 8 born after standard infertility treatment (INF), which did not include IVF; and 8 infants whose parents had experienced no infertility problems (Control group: C). All were videotaped at home in free play with their mothers at 4, 7, 13, and 21 weeks of age. A 3‐min extract of each video was reviewed in detail by means of an objective coding system, to define the style of communication. Data from this analysis was subjected to two separate repeated measures of analyses of variance. We found no evidence of detrimental effects of infertility treatment on mother–infant communication, but there were “positive” differences in behavior in the pairs where the mother had been so treated. Thus, while maternal “caretaking” episodes had become infrequent in the control group by the age of 21 weeks, in the two treatment groups the mothers continued to show many caretaking behaviors with infants of this age. Furthermore, infants of both the IVF and INF groups showed significantly higher frequencies of “play” episodes than those in the control group (p = 0.018 and p = 0.004, respectively). Apart from these differences, mother–infant interactions were generally the same in the three groups. The results indicate that communication between mothers and infants is likely to develop along the normal path after IVF or INF treatment, but that mothers who have had these infertility treatments may be more attentive to their infants, and their infants are significantly more playful. Since the IVF and the INF groups were similar, it would appear that these differences from the control group are related to the experience of a successful treatment for infertility, and not related to any particular stresses that may be associated with IVF treatment. ©2001 Michigan Association for Infant Mental Health.     

Pain perception as a function of self-focused rumination

Pain sensitivity and tolerance were studied using the cold-pressor technique. A 3 independent groups design was employed using rumination as the independent variable. Group 1 was given a situation in which anger-related self-rumination was introduced. Group 2 was given a self-related rumination task in which anger was not induced. Group 3 received a rumination task not related to the self. In addition, the State-Trait Anger Expression Inventory was given prior to the experiment to test the hypothesis that ratings on the Anger-In subtest would correlate with pain sensitivity. In each group were 6 men and 6 women. Each participant took the anger and another inventory not relevant to the present study before the experiment. An anger measure was taken before and after the experiment for each group to see if the anger induction in Group 1 actually increased anger. There were no differences among the 3 groups on the second anger measure, so differences between Groups 1 and 2 could not be attributed to anger. A 1-way analysis of variance for 3 groups showed a strong main effect on pain tolerance but not pain sensitivity. Groups 1 and 2 were significantly more tolerant of pain than Group 3. The correlation of ratings on the Anger-In (internalized anger) subtest fell short of statistical significance with pain sensitivity and also was not significant for pain tolerance. Results were discussed in terms of the possibility that self-rumination may increase pain tolerance by requiring a greater cognitive load than nonself rumination.     

The effects of increasing familiarity on infants' reactions to adult strangers

The influence of the presence and novelty of an adult stranger on the reactions of 12-mo-old infants was investigated. Subjects were placed near their mothers in a room containing a new toy and either the same, a different, or no adult stranger for 8 4-min trials. Results indicated that the Same-Adult Group spent more time near the adult, less time near and touching their mothers, and more time near and touching the toys than the Different-Adult Group. These trends emerged as the trials progressed, and evidenced the Same-Adult Group's growing familiarity with the adult. The No-Adult Group spent less time near or touching their mothers and more time near or touching the toys than the Different-Adult Group, but did not differ from the Same-Adult Group on these responses. The findings suggest that fearful or cautious reactions to adult strangers disappear rapidly as the adult becomes familiar and point to the value of studying the process whereby the infant becomes familiar with new people.     

Aversive and compensatory classical conditioning with diazepam as conditional stimulus

The purpose of the first experiment was to investigate whether diazepam could acquire anxiogenic properties by signalling an aversive event. Rats were trained in an operant chamber in the pentylenetetrazol (PTZ) model of anxiety. Thereafter the animals were divided into groups that received classical diazepam conditioning (Group 1), and conditioning of diazepam + tone (Group 2). In the test phase diazepam was injected prior to placement in the operant chamber. Group 2 selected the PTZ-appropriate lever more often than the other groups, indicating that the tone induced anxiety, and diazepam did not. Tones and shock may therefore be more easily associated than diazepam and shock. The second experiment investigated this. Rats were trained the same way as in the first experiment. Thereafter the experimental group received injections of a small dose of diazepam prior to a second injection of a large dose of diazepam. The hypothesis was that a compensatory anxiogenic conditional response to diazepam's anxiolytic effect should be elicited by the small dose. There were no differences between the groups in lever selection, indicating that a compensatory anxiogenic response was not elicited.     

Effects of electromyographic biofeedback on reaction time and movement time

The effects of electromyographic (EMG) biofeedback on reaction time (RT) and movement time (MT) were investigated utilizing 42 right-handed, male subjects from a university population. Subjects were randomly divided into three groups, a control group and two experimental groups. Both experimental groups were exposed to their EMG signals from their triceps brachii during the task, one experimental group received written information explaining the purpose of the EMG was to improve performance through biofeedback. Reaction times of the first block of 25 trials were significantly faster than those on the subsequent three blocks of trials for all groups. This provided evidence of learning. No other significant effects for reaction times were observed. Mean movement time for the EMG-only group was significantly slower than the means of either the Control group or EMG-Biofeedback group, with no difference between the latter two. The differences between experimental groups may have been related to alteration of strategy, anxiety, motivation.     

Cell phone use and visual attention

The purpose of the present study was to evaluate how much cell phones and just speaking (similar to speaking to someone in the car vs a hands-free cell phone task) interfere with visual attention skills as might be required in a driving situation. Influence of cell phones on attention has been noted but little research has been completed. Licensed adult drivers were divided into three groups (ns = 15) with all subjects taking the Connors Continuous Performance Test II. Group 1 performed without any distractions: those in Group 2 performed with someone in the same room talking to them: Group 3 engaged in a cell phone conversation during the task. Overall, there were substantial differences among groups on all variables, but primarily between the control group and the two experimental groups. While the cell phone group had lower mean scores than the talking group overall, the differences were not significant. Thus, while cell phones were distracting to visual attention functions on the Connors task, they were not more distracting than a similarly active conversation without a cell phone.     

Human exploratory behavior in a “natural” versus a laboratory setting

Two groups of 30 Ss each viewed a series of nonrepresentational patterns varying in three physical parameters. For the “natural-setting” group the patterns were arranged in a loose-leaf binder and S, unaware that his responses were being recorded, viewed them “spontaneously” prior to the “beginning” of the experiment. For the “laboratory-setting” group the patterns were presented by means of slides and S, under instructions similar to those employed in conventional studies of human exploratory behavior, controlled the duration of each exposure by pressing a telegraph-key. A 4-factor analysis of variance of the viewing times showed that both groups spent the same amount of time examining the patterns and that their viewing times were not differentially affected by any of the three pattern parameters. It was tentatively concluded that the “unnaturalness” of conventional laboratory settings may have little effect on human exploratory responses.     

I: Effect of delayed auditory feedback on speech and keytapping

The effects of delayed auditory feedback (DAF) on the performance of simple speech and keytapping tasks were compared. In the first experiment, each of the fourteen young adult subjects was asked to repeat the speech sound “b” in groups of three sounds. The subject heard his undelayed speech sounds through earphones. Under the delay condition, the speech sounds were delayed 244 millisec. before being returned to the subject's earphones. In the second experiment, each of the same subjects was asked to tap on a key in groups of three taps. The subjects heard an undelayed click through earphones each time they tapped on the key. Under the delay condition, the clicks were delayed 244 millisec. before being returned to the earphones. Graphic recordings were made of the time and intensity characteristics of tapping under both conditions.

The changes which occurred in speech and keytapping under DAF were qualitatively the same and consisted of increases in intensity and unit-to-unit time of both taps and speech sounds. When performing under DAF, the subjects also exhibited a tendency to repeat more sounds or to tap more times than had been requested. The percentage of change in intensity and time characteristics for speech and keytapping performances which occurred under DAF were not significantly different for the two motor systems. The amount of change in speech performance under DAF did not correlate significantly with the amount of change in keytapping performance.     

TETRAD: Discovering Causal Structure

We describe multilevel modeling of cognitive function in subjects with schizophrenia, their healthy first degree relatives and controls. The purpose of the study was to compare mean cognitive performance between the three groups after adjusting for various covariates, as well as to investigate differences in the variances. Multilevel models were required because subjects were nested within families and some of the measures were repeated several times on the same subject. The following four methodological issues that arose during the analysis of the data are discussed. First, when the random effects distribution was not normal, non-parametric maximum likelihood (NPML) was employed, leading to a different conclusion than the conventional multilevel model regarding one of the main study hypotheses. Second, the between-subject (within-family) variance was allowed to differ between the three groups. This corresponded to the variance at level 1 or level 2 depending on whether repeated measures were analyzed. Third, a positively skewed response was analyzed using a number of different generalized linear mixed models. Finally, penalized quasilikelihood (PQL) estimates for a binomial response were compared with estimates obtained using Gaussian quadrature. A small simulation study was carried out to assess the accuracy of the latter.     

Sex-role attitudes: A comparison of sex-race groups

This study investigated the differences in the three dimensions of sex-role attitudes among four sex-race groups and also the ability of sex and race jointly to condition the effects of background characteristics on these attitudes. In a sample of 409 college students significant differences were found on all three dimensions of sex-role attitudes between the two sex groups, but not between the two racial groups, implying that gender is the most significant variable in eliciting differences in sex-role attitudes. Stepwise multiple regression analysis did not find a single common predictor to explain the variance in the wife role, the mother role, and the father role for the four sex-race group models. Some predictors were found in common in the four models explaining the variance in three dimensions of sex-role attitudes when the effects of sex and race were examined separately. However, the interaction of race and sex in conditioning the effect of background variables on the sex-role attitudes was quite different for each of the four sex-race subsamples.     

Age Differences in the Variance of Personality Characteristics

In contrast to mean‐level comparisons, age group differences in personality trait variance have received only passing research interest. This may seem surprising because individual differences in personality characteristics are exactly what most of personality psychology is about. Because different proposed mechanisms of personality development may entail either increases or decreases in variance over time, the current study is exploratory in nature. Age differences in variance were tested by comparing the standard deviations of the five‐factor model domain and facet scales across two age groups (20 to 30 years old versus 50 to 60 years old). Samples from three cultures (Estonia, the Czech Republic and Russia) were employed, and two methods (self‐reports and informant‐reports) were used. The results showed modest convergence across samples and methods. Age group differences were significant for 11 of 150 facet‐level comparisons but never consistently for the same facets. No significant age group differences were observed for the five‐factor model domain variance. Therefore, there is little evidence for individual differences in personality characteristics being systematically smaller or larger in older as opposed to younger people. We discuss the implications of these findings for understanding personality development. Copyright © 2015 European Association of Personality Psychology     

Maternal depression and infant temperament characteristics

One hundred-thirty-nine women participated in this longitudinal study from the third trimester of pregnancy through 8-months postpartum. Women completed depression scales at several time points and rated their infant's characteristics and childcare stress at 2- and 6-months postpartum. Mothers' reports of infant temperament were significantly different for depressed and non-depressed mothers, with depressed mothers reporting more difficult infants at both measurement points. These differences remained after controlling for histories of maternal abuse or prenatal anxiety, which occurred more often in the depressed mothers. There were no significant differences in childcare stress or perceived support between the groups. Infant temperament and childcare stress did not change over time. Recommendations for practice include consistent ongoing evaluations of the "goodness of fit" within the dyad and exploring interventions for depressed mothers that provide guidance about interactions with their infants and the appropriateness of the infant behaviors.     

Classifying Dating Couples: Gender as Reflected in Traits,Roles, and Resulting Behavior

A cluster analysis was conducted in an attempt to uncover a taxonomy of specific gender-related, trait-role constellations within a sample of 117 pairs of men and women involved in serious dating relationships. This taxonomy was then used in predicting the extent to which men and women reportedly gave (or failed to give) affection and respect to each other during the 2 weeks prior to the study. The cluster analysis revealed three distinct groups, which were labeled Respect-Giving Reversed (Group 1), Affectionate (Group 2), and Traditional (Group 3) Results of multivariate analyses of variance revealed that, overall, significant behavioral differences existed among the three groups. Group 1 was characterized by low reported giving of affection and respect among women. Group 2 was characterized by high reported giving of affection and respect among men and women, and Group 3 was characterized by low reported giving of affection and respect among men. Implications for the use of empirically derived taxonomies in the study of close relationships are discussed.     

Relationship‐based intervention with at‐risk mothers: Outcome in the first year of life

This study shows that a home‐visiting, relationship‐based intervention, as defined in the UCLA Family Development Project, affects certain areas of family functioning by the time an infant reaches 12 months. Within a randomized trial design, we compared two samples of mothers who were identified as at risk for inadequate parenting in the third trimester of pregnancy with their first child. The primary risk characteristics were poverty and a lack of support. Thirty‐one of these mothers experienced the intervention and thirty‐three did not. Mothers given the opportunity of a positive, trusting, and working relationship with a weekly home visitor as well as a mother–infant group scored significantly higher on measures of their experienced partner and family support. The intervention also made a significant impact on three critical social‐emotional mother–infant transactions in the first year of life. Thus, on a variety of indices including the responses to the Ainsworth Strange Situation, the children in the intervention group were more secure and their mothers more responsive to their needs. Children experiencing the intervention were also more autonomous and task oriented and were encouraged in this regard by their mothers. ©1999 Michigan Association for Infant Mental Health.     

The Rôle of Clasping Activity in Adaptive Behavior of the Infant Chimpanzee: II. Visual Discrimination

The existence of no significant attitudinal differences between three generations of selected families was hypothesized. Basic life attitudes of 199 college students were compared with those of their middlescent parents and senescent grandparents. The Adolescent-Middlescent Attitude Scale developed by Armstrong was administered to the adolescents in the college classroom and mailed to parents and grandparents. The least squares analysis of variance was employed to determine the amount and direction of variance in attitudes among the three generations of respondents. The F factors were found to be significant at the .05 level of confidence. This finding suggested the possibility of basic attitudinal differences among the adolescent, middlescent, and senescent groups. Significant variance was found within the middlescent generation, revealing attitude differences between the adolescent's mother and father in relation to basic life concepts. Adjustment similarities and differences among the three generations were predicted from the attitudinal data.