Sample stimulus control shaping and restricted stimulus control in capuchin monkeys: a methodological note

This paper reports use of sample stimulus control shaping procedures to teach arbitrary matching-to-sample to 2 capuchin monkeys (Cebus apella). The procedures started with identity matching-to-sample. During shaping, stimulus features of the sample were altered gradually, rendering samples and comparisons increasingly physically dissimilar. The objective was to transform identity matching into arbitrary matching (i.e., matching not based on common physical features of the sample and comparison stimuli). Experiment 1 used a two-comparison procedure. The shaping procedure was ultimately effective, but occasional high error rates at certain program steps inspired a follow-up study. Experiment 2 used the same basic approach, but with a three-comparison matching task. During shaping, the monkey performed accurately until the final steps of the program. Subsequent experimentation tested the hypothesis that the decrease in accuracy was due to restricted stimulus control by sample stimulus features that had not yet been changed in the shaping program. Results were consistent with this hypothesis, thus suggesting a new approach that may transform the sample stimulus control shaping procedure from a sometimes useful laboratory tool to a more general approach to teaching the first instance of arbitrary matching performances to participants who show protracted difficulties in learning such performances.     

Therapist Factors Matter: A Systematic Review of Parent Interventions Directed at Children’s Behavior Problems

The present review systematically explored research examining the relationship between therapist‐related factors and the outcomes of parent interventions directed at children’s behavior problems. A systematic search of the literature was conducted with online scientific databases, parenting programs, web sites, and bibliographic references of the selected articles, according to PRISMA guidelines. A total of 24 quantitative studies met the inclusion criteria. Although some methodological limitations were identified with respect to the measurement of therapist factors, the reviewed research strongly suggests that the therapist plays a critical role in parent interventions directed at behavior problems. In particular, many parent outcomes are found to be related to the parent–therapist alliance, the therapist’s fidelity to the intervention, specific therapist’s in‐session actions, and the therapist’s personal variables. The parent–therapist alliance and therapist fidelity to the intervention consistently relate to changes in parenting practices, and alliance additionally relates to fewer perceived barriers to participation in treatment, more treatment acceptability, and greater parenting satisfaction and self‐efficacy. In addition, specific in‐session therapist interpersonal actions relate to parents’ engagement and satisfaction, while both the therapist’s interpersonal actions and more active skills relate to parent change. Therapist’s personal variables have been scarcely or poorly studied to date, but the results found justify the need to develop further research in this area. In conclusion, more attention should be given to the role of the therapist when implementing parenting programs directed at behavior problems, and more and better research is needed that can overcome the methodological limitations identified.     

The Need to Present a Perfect Body Image: Development of a New Measure of Perfectionistic Self-Presentation

Perfectionistic self-presentation is linked to different clinical conditions and specially to eating disorders. In fact, the role that the drive to reach “perfection” and display it to others plays on eating and body image-related symptoms has long been the target of theoretical and empirical interest. However, an instrument that specifically assessed the need to present a perfect body image to others did not exist. The current study presents the development and validation of the Perfectionistic Self-Presentation Scale – Body Image (PSPS-BI), a measure designed to assess the need to present a perfect body image to others by displaying a flawless physical appearance and by occulting perceived imperfections in a public context. Three studies that included a total of 364 males and 541 females with ages between 18 to 38 years, were used to examine the structure and psychometric properties of the scale. Results showed that PSPS-BI presents two factors that measure the concealment of body imperfections and the display of body perfection. PSPS-BI revealed good internal reliability and temporal stability. Also, the PSPS-BI revealed good concurrent validity, tested with measures of perfectionism, body image flexibility, and general and eating psychopathology. Furthermore, a mediational analysis indicated that the need to present a perfect body image to others fully mediates the relationship between a general measure of perfectionistic self-presentation and drive for thinness, in both men and women. PSPS-BI showed good preliminary evidence as a reliable and accurate measure that seems to offer new possibilities to the research field of body image and eating-related difficulties.     

Mental Health of Parents of Children with Congenital Zika Virus Syndrome in Brazil

This study aims to analyze the potential impact of taking care of a child with congenital Zika virus syndrome (CZS) on the mental health of parents. Specifically, three objectives were formulated: (a) to assess the level of mental health of the parents; (b) to examine the influence of subjective well-being and fatigue as predictors of parents’ mental health; and (c) to identify the impact of sociodemographic variables on parents’ mental health. Sixty-nine mothers (M_age?=?26.38; SD?=?6.23) and 17 fathers (M_age?=?31.41; SD?=?7.57) of children diagnosed with CZS took part in this study. They answered a questionnaire containing measures of positive and negative affects, life satisfaction, fatigue, mental health, as well as sociodemographic questions. The results indicated that approximately 7% of the participants had low levels of mental health and probable emotional disorder. In addition, higher levels of fatigue and negative affects and lower levels of life satisfaction significantly predict a lower level of mental health. Finally, comparative analysis showed significant differences between fathers and mothers: mothers reported experiencing fewer positive and more negative affects, a lower level of satisfaction with life, a higher level of fatigue and worse mental health. In summary, this article presents an overview of the mental health of mothers and fathers of children with CZS and points the way to devising strategies for psychological intervention that promote the adaptation of parents to this kind of developmental disability in the family.     

Self-reported psychosocial factors among in vitro fertilization patients interviewed alone or with the partner

The purpose of this study was to compare the sociodemographic and psychosocial characteristics reported by female in vitro fertilization (IVF) patients interviewed alone or with the partner in heterosexual couples. During 12 months (2011–2012), all patients undergoing IVF or intracytoplasmic sperm injection at one public reproductive medicine unit, in Portugal, were interviewed on the day of the diagnosis of pregnancy, being recruited 221 women interviewed with the partner and 92 interviewed alone. Interviewers collected data on sociodemographic and obstetric characteristics; and anxiety, depression, social support and partner relationship were collected by self-administered questionnaires. χ² test was used to assess the independent association between the categorical variables and being interviewed alone or with the partner. For continuous variables, mean or median differences were compared by the t-test or the Mann–Whitney test, according to data distribution. No statistically significant differences were found in the self-reporting of depression, anxiety, social support and partner relationship or in sociodemographic and obstetric characteristics between women interviewed alone or with the partner. Although women interviewed alone were older and more frequently had children than women interviewed with the partner, no significant associations were observed. Thus, having a male partner present in the research setting during a self-administered questionnaire seems not to influence women’s responses to psychosocial measures. Other outcomes and settings need to be evaluated to support evidence-based guidelines for research on infertility.     

Depression and anxiety symptoms following cancer diagnosis: a cross-sectional study

Introduction: The aims of the present study were to assess demographic and clinical characteristics of patients after receiving a cancer diagnosis, and to determine possible risk factors for anxiety and depression. Methods: All consecutive patients aged 18 or above, were assessed before starting intravenous chemotherapy for the first time with the Hospital Anxiety and Depression Scale (HADS), the Distress Thermometer, and a Visual Analog Scale for pain. Demographic and clinical data were also collected. Results: The patients assessed (n = 270) had a mean age of 59.4 (SD = 11.8) years, and 50.7% were women. Tumours were more frequently colorectal (27.2%), lung (18.8%) and breast (17.6%), and 68.9% were stages 3 or 4. A HADS Anxiety score ≥8 was present in 30% of the patients, a Depression score ≥8 in 24.1%, and a Distress score ≥4 in 44.4%. Independent risk factors for HADS Depression score ≥8 were being a woman (OR = 2.45; p = 0.004), being older (OR = 1.04; p = 0.005), and cancer stage 3–4 (OR = 2.24; p = 0.023) in the multivariable analysis; for Anxiety ≥8 they were being a woman (OR = 2.47; p = 0.002), having a past psychiatric consultation (OR = 2.83; p = 0.029), and cancer stage 3–4 (OR = 1.90; p = 0.047). Conclusion: These results suggest the need for greater awareness and a differentiated approach to patients at increased risk of anxiety and depression in the early stages of treatment and before starting chemotherapy.     

Effects of different training histories upon manufacturing a tool to solve a problem: insight in capuchin monkeys (Sapajus spp.)

Animal Cognition - The emergence of novel behavior is a multilayered phenomenon that comprehends distinct processes. One such process is known as insightful problem solving. “Insight”...     

Temporal generalization gradients following an interdimensional discrimination protocol

We investigated the effects of interdimensional discrimination training in the temporal generalization gradient. In a matching-to-sample task, pigeons learned to choose key S after a T–s houselight sample and key NS in the absence of the houselight sample. For one group of pigeons, T?=?20?s; for another, T?=?10?s. Subsequently, houselight duration was varied to obtain temporal generalization gradients. Results showed that (a) proportion S increased as houselight duration ranged from 0?s to T?s and then remained high for houselight durations longer than T; (b) the gradients were well described by negative-exponential functions; (c) these non-flat gradients were present from the beginning of testing, and; (d) the average gradients obtained with T?=?20?s and T?=?10?s overlapped when plotted in relative time. We conclude that temporal control does not require explicit discrimination training along the temporal dimension, and that temporal generalization gradients obtained with an interdimensional protocol show the scalar property of timing. We discuss how these findings challenge current models of timing.     

Cooperative responding in rats maintained by fixed‐ and variable‐ratio schedules

The present study investigated the effects of fixed‐ratio (FR) and variable‐ratio (VR) reinforcement schedules on patterns of cooperative responding in pairs of rats. Experiment 1 arranged FR 1, FR 10, and VR 10 schedules to establish cooperative responding (water delivery depended on the joint responding of two rats). Cooperative response rates and proportions were higher under intermittent schedules than under continuous reinforcement. The FR 10 schedule generated a break‐and‐run pattern, whereas the VR 10 schedule generated a relatively high and constant rate pattern. Experiment 2 evaluated the effects of parametric manipulations of FR and VR schedules on cooperative responding. Rates and proportions of cooperative responding generally increased between ratio sizes of 1 and 5 but showed no consistent trend as the ratio increased from 5 to 10. Experiment 3 contrasted cooperative responding between an FR6 schedule and a yoked control schedule. Coordinated behavior occurred at a higher rate under the former schedule. The present study showed that external consequences and the schedules under which the delivery of these consequences are based, select patterns of coordinated behavior.