Improving construct validity: Cronbach, Meehl, and Neurath's ship

Smith's article "On Construct Validity: Issues of Method and Measurement" is a fine tribute to L. J. Cronbach and P. E. Meehl (1955) that clarifies the current state and future directions in the understanding of construct validity. Construct validity is a dynamic process, and fit indices need to be used at the service of understanding, not in place of it. The failure of a study or set of studies to support a construct, a measure, or the theory underlying it admits of many explanations, and the ways scientists interpret such failures are prone to cognitive biases and motivated reasoning. This suggests why metrics designed to index the extent to which observations match expectations can be useful prostheses to scientific judgments. As P. E. Meehl (1954) showed decades ago, quantitative, statistical formulas and indices tend to outperform informal, qualitative judgments, and this applies as much to the way researchers evaluate constructs and measures as to judgments in the consulting room.     

Visual kin recognition and family resemblance in chimpanzees (Pan troglodytes)

The male-offspring biased visual kin recognition in chimpanzees (Pan troglodytes) reported by L. A. Parr and F. B. M. de Waal (1999) was replicated with human (Homo sapiens) participants and a principal components analysis (PCA) of pixel maps of the chimpanzee face photos. With the same original materials and methods, both humans and the PCA produced the same asymmetry in kin recognition as found with the chimpanzees. The PCA suggested that the asymmetry was a function of differences in the distribution of global characteristics associated with the framing of the faces in the son and daughter test sets. Eliminating potential framing biases, either by cropping the photos tightly to the faces or by rebalancing the recognition foils, eliminated the asymmetry but not human participants' ability to recognize chimpanzee kin.     

Salience of caller identity in rhesus monkey (Macaca mulatta) coos and screams: perceptual experiments with human (Homo sapiens) listeners

Recent evidence from acoustic analysis and playback experiments indicates that adult female rhesus monkey (Macaca mulatta) coos are individually distinctive but their screams are not. In this study, the authors compared discrimination of individual identity in these sounds by naive human listeners who judged whether 2 sounds had been produced by the same monkey or 2 monkeys. Each of 3 experiments using this same-different design showed significantly better discrimination of vocalizer identity from coos than from screams. Experiment 1 demonstrated the basic finding. Experiment 2 also tested the effect of non-identity-related scream variation, and Experiment 3 added a comparison with human vowel sounds. Outcomes suggest that acoustic structural differences in coos and screams influence salience of caller-identity cues, with significant implications for understanding the functions of these calls.     

Exposure to Major Stressors May Reduce Dysfunctional Cognition About Them1

Exposure to a given stressor may enhance future resistance to that specific event as well as to stressful events more generally. One mechanism may be that prior exposure decreases dysfunctional beliefs about the specific event or to events in general (i. e., general dysfunctional attitudes). The research described here examined whether exposure to divorce was related to fewer divorce‐specific and general dysfunctional attitudes. Divorced participants reported fewer divorce‐specific dysfunctional attitudes than did happily married participants or married participants considering divorce. Similarly, adult children of divorced parents had fewer divorce‐specific dysfunctional attitudes than did adult children of happily married parents. A different pattern was observed for general dysfunctional attitudes.     

Parents' Experiences with Genetic Counseling After the Birth of a Baby with a Genetic Disorder: An Exploratory Study

Little is known about factors determining which families utilize genetic counseling services. We conducted semistructured interviews with parents of four children born with cystic fibrosis (CF) and ten with Down's syndrome (DS) to ascertain reasons for using, or not using, genetic counseling services in the state of Victoria, Australia. We also explored the usefulness of genetic counseling for the families who had experienced it, and the perceived role of genetic counseling. All mothers of children with CF see a genetic counselor as part of a structured education program following diagnosis through newborn screening. Information overload was identified by them as an important problem. There is no specific program for families of children with DS. Six of them had received genetic counseling and four had not, either because it was not specifically offered to them or because they did not pursue it in the context of misconceptions about its purpose. The timing of the offer of genetic counseling is important and needs to take into account parents' coping strategies after diagnosis. Several parents commented on the favorable aspects of counseling, including getting information they needed to deal with the diagnosis and relief of guilt. Better awareness of genetic counseling by referring physicians, and providing counseling at more than one visit, may contribute to a more effective service.     

Grandparents' psychological well-being after loss of contact with their grandchildren.

This study examined how loss of contact with grandchildren due to parental separation or divorce, family feud, or a sudden event, such as relocation, affected the emotional well-being of grandparents (N = 442). Using data from the Longitudinal Study of Generations, the depressive symptoms of grandparents were tracked over 15 years. Growth curve analysis was used to compare grandparents who had lost contact with their grandchildren with those who had not and to examine preloss to postloss change in depressive symptoms. Grandparents who lost contact with their grandchildren experienced a steeper increase in depressive symptoms as they aged compared with other grandparents. Depressive symptoms of grandparents who lost contact because of a sudden event increased up to 3 years following the loss but returned to equilibrium thereafter. The authors conclude that grandparents who lost contact with their grandchildren experienced a negative impact on their emotional health.