Using the Internet to investigate consumer choice spaces

Traditional investigations of consumer choice processes include a matrix of alternatives described by attributes. The researcher-createdmatrix presents a product option space for the participant. In this article, we propose an alternative methodological approach to consumer choice processes. Specifically, we investigate choice processes when a participant creates his/her own product space. We describe a Web-based program and methodology used to collect data for three customizable products. Empirical results indicate that consumers are willing and able to make choices from their own product space. This research provides a new avenue for exploring choice processes.     

Asymptotic log-linear analysis: some cautions concerning sparse frequency tables

Traditional asymptotic probability values resulting from log-linear analyses of sparse frequency tables are often much too large. Asymptotic probability values for chi-squared and likelihood-ratio statistics are compared to nonasymptotic and exact probability values for selected log-linear models. The asymptotic probability values are all too often substantially larger than the exact probability values for the analysis of sparse frequency tables. An exact nondirectional permutation method is presented to analyze combined independent multinomial distributions. Exact nondirectional permutation methods to analyze hypergeometric distributions associated with r-way frequency tables are confined to r = 2.     

Shared Expectations and Implicit Coordination in Tennis Doubles Teams

Very little of the existing research on team cognition has looked at sports teams. The purpose of this study was to extend previous research to the sports domain, and empirically test the relationship between one aspect of team cognition—shared expectations—and implicit coordination in 71 American tennis doubles teams. We tested a model hypothesizing a link between prior experience, shared expectations, and implicit coordination. Prior experience influenced implicit coordination directly, as well as through a positive relationship with shared expectations. The findings highlight the potential of using behavioral measures of team coordination in sport psychology.     

Age-based discrimination of rival males in western bluebirds

Adaptive social behavior frequently involves discriminating between classes of individuals such as relatives versus non-relatives, older versus younger individuals, or individuals of different status. In the absence of spatial cues, this discrimination may be based on signals that correlate with fitness-related traits (e.g., older or high-status males may sing higher performance songs) or with identity, for example, when receivers distinguish and classify signalers based on their unique signal structure. Here, we examine vocal age-based discrimination in western bluebirds (Sialia mexicana), a North American songbird in which older males have a significant advantage in obtaining extra-pair fertilizations, and therefore pose a significantly higher threat to paternity than younger males. We asked whether western bluebird males showed a higher response to playback of songs of older males compared to younger males relative to their own age. We prepared song stimuli by removing three potential signals of age that have been identified as important in other species: (1) note consistency (which was achieved by playing a single instance of each note repeatedly), (2) note repertoire size, and (3) singing rate (the latter two were equalized across conditions). Even in the absence of these potential signals of age, young males responded more strongly to playback of older males’ songs than to young males’ songs, suggesting that they are able to discriminate between age classes relative to the threat they pose. Further research is required to determine whether this discrimination is based on individual recognition or signal features that are correlated with age.     

Resampling probability values for weighted kappa with multiple raters

A new procedure to compute weighted kappa with multiple raters is described. A resampling procedure to compute approximate probability values for weighted kappa with multiple raters is presented. Applications of weighted kappa are illustrated with an example analysis of classifications by three independent raters.     

The exact variance of weighted kappa with multiple raters

Weighted kappa described by Cohen in 1968 is widely used in psychological research to measure agreement between two independent raters. Everitt then provided the exact variance for weighted kappa for two raters. In this paper, Everitt's exact variance is extended to three or more raters.     

Analysis of trend: a permutation alternative to the F test

When the categories of the independent variable in an analysis of variance are quantitative, it is more informative to evaluate the trends in the treatment means than to simply compare differences among the treatment means. A permutation alternative to the conventional F test is shown to possess significant advantages when analyzing trend among quantitative treatments in a one-way analysis of variance. An example with and without an extreme data point illustrates the effectiveness of the permutation alternative for the analysis of trend when homogeneity of variance is compromised.     

On the relations between distinct aspects of psychological distance: An ecological basis of construal-level theory

Construal-level theory's basic assumption of a positive relationship between psychological distance and abstractness of mental representations presupposes a unitary distance construct. Although prior research testifies to convergent influences of temporal, spatial, social and reality (probability) distance, there is no direct evidence for the integration function of all four major distance aspects assessed within the same study with reference to the same target objects. Does high (low) distance in any aspect imply high (low) distance in all other aspects, or are discounting effects (e.g., high temporal distance rendering high personal distance obsolete) sometimes apparent in negative correlations? In pursuing this question, we obtained strong and regular positive correlations between all four distance aspects, across judges and judgment targets, regardless of whether freely construed future episodes or really experienced past episodes were judged. Existing ecological correlations seem to account for the positive relationship between time, space, probability and temporal distance.     

Lesbian motherhood and genetic choices

Rhonda, a physician, and Clara, a registered nurse, have been lovers for the past 7 years. Both women are in their 30s, in good health, and financially stable. Clara has contacted Dr. Robinson, a highly regarded obstetrician and geneticist, with an unusual request. Clara is seeking to become pregnant by means of in vitro fertilization (IVF) with an embryo transfer (ET) technology. She proposes being implanted with ova harvested from her partner, Rhonda, and fertilized in vitro with donor sperm from a local medical-school sperm bank. Dr. Robinson explains the relatively low success rate involved in IVF and ET techniques and suggests artificial insemination of Clara's own ova. Clara and Rhonda understand the low success rates but are undeterred. Their mutual goal is not merely to have a child but to share in the maternity of their children. What ethical issues are raised by the plan Clara and Rhonda propose? What are Dr. Robinson's ethical responsibilities with respect to the request by Clara and Rhonda?     

Sociocultural and Psychological Links to Men’s Engagement in Risky Body Change Behaviors

The present theory-driven, empirical evaluation examined cross-sectional influences on men’s engagement in risky body change behaviors. The study tested a slightly revised version of the Tripartite Influence Model (Thompson et al. 1999) with a sample of 156 male undergraduate students from the Midwestern Region of the United States. Participants completed measures pertaining to body image and health-risk behaviors. Consistent with the Tripartite Influence Model (Thompson et al. 1999), individual psychological variables mediated the association between sociocultural influences and muscularity-oriented body dissatisfaction. Body dissatisfaction mediated the relation between psychological variables and engagement in body change behaviors. Theoretical models developed to explain body change behaviors among women may be applicable to men when constructs are assessed in ways that are relevant to men.