The perception of face gender: The role of stimulus structure in recognition and classification

The perception of face gender was examined in the context of extending “face space” models of human face representations to include the perceptual categories defined by male and female faces. We collected data on the recognizability, gender classifiability (reaction time to classify a face as male/female), attractiveness, and masculinity/femininity of individual male and female faces. Factor analyses applied separately to the data for male and female faces yielded the following results. First, for both male and female faces, the recognizability and gender classifiability of faces were independent—a result inconsistent with the hypothesis that both recognizability and gender classifiability depend on a face’s “distance” from the subcategory gender prototype. Instead, caricatured aspects of gender (femininity/masculinity ratings) related to the gender classifiability of the faces. Second, facial attractiveness related inversely to face recognizability for male, but not for female, faces—a result that resolves inconsistencies in previous studies. Third, attractiveness and femininity for female faces were nearly equivalent, but attractiveness and masculinity for male faces were not equivalent. Finally, we applied principal component analysis to the pixel-coded face images with the aim of extracting measures related to the gender classifiability and recognizability of individual faces. We incorporated these model-derived measures into the factor analysis with the human rating and performance measures.     

Mate choice in the domestic cat (Felis silvestris catus L.)

The domestic cat (Felis silvestris catus L.) has colonized different types of environments that differ in their spatial distribution of resources. Urban environments are characterized by highly clumped distributions of food and shelter, allowing domestic cats to live in large multimale‐multifemale groups. In such a situation, questions arise about male and female mating strategies. In particular, do females exert active mate choice? We tested this question using behavioural records on acceptance and refusal of males by estrous females. Our results showed that most females copulated with several males during a single estrus period. The variability of female behaviour was high: six females copulated with all courting males whereas three others mated with most courting males; six others copulated with half or less of the courting males. Even if some females copulated with certain males more often than with others, the identity of the most successful males changed each time. These results show that most females did not choose mates among different males available. The results are discussed in terms of optimal reproductive strategies of males and females in an urban environment. Aggr. Behav. 26:455–465, 2000. © 2000 Wiley‐Liss, Inc.     

Infanticide in rural male cats (Felis catus L.) as a reproductive mating tactic

Here we report six cases of infanticide in the domestic cat directly observed in populations located in the rural environment. This is the first time that infanticide in domestic cats has been witnessed directly and described. All infanticidal males were fully adult and sexually mature unknown males. All kittens killed were within their first week of life. The killing pattern was generally the same as that described in lions. All females reacted aggressively but could not prevent the infanticide. Three hypotheses are discussed : (1) infanticide is a remnant of cat male reproductive strategy selected in the original environment; (2) the conditions of the rural environment have created a selection pressure encouraging a polymorphism of infanticidal and noninfanticidal males to evolve; (3) infanticide is an abnormal behaviour caused by environmental conditions such as human disturbance. Aggr. Behav. 25:445–449, 1999. © 1999 Wiley‐Liss, Inc.     

Integration without awareness: expanding the limits of unconscious processing

Human conscious awareness is commonly seen as the climax of evolution. However, what function-if any-it serves in human behavior is still debated. One of the leading suggestions is that the cardinal function of conscious awareness is to integrate numerous inputs-including the multitude of features and objects in a complex scene-across different levels of analysis into a unified, coherent, and meaningful perceptual experience. Here we demonstrate, however, that integration of objects with their background scenes can be achieved without awareness of either. We used a binocular rivalry technique known as continuous flash suppression to induce perceptual suppression in a group of human observers. Complex scenes that included incongruent objects escaped perceptual suppression faster than normal scenes did. We conclude that visual awareness is not needed for object-background integration or for processing the likelihood of an object to appear within a given semantic context, but may be needed for dealing with novel situations.     

Positive mood effects on delay discounting

Delay discounting is the process by which the value of an expected reward decreases as the delay to obtaining that reward increases. Individuals with higher discounting rates tend to prefer smaller immediate rewards over larger delayed rewards. Previous research has indicated that personality can influence an individual's discounting rates, with higher levels of Extraversion predicting a preference for immediate gratification. The current study examined how this relationship would be influenced by situational mood inductions. While main effects were observed for both Extraversion and cognitive ability in the prediction of discounting rates, a significant interaction was also observed between Extraversion and positive affect. Extraverted individuals were more likely to prefer an immediate reward when first put in a positive mood. Extraverts thus appear particularly sensitive to impulsive, incentive-reward-driven behavior by temperament and by situational factors heightening positive affect.     

Mentoring Nurses in Familial Cancer Risk Assessment and Counseling: Lessons Learned From a Formative Evaluation

Background. As familial cancer genetic services moves into community practice increased numbers of trained health professionals are needed to counsel individuals seeking cancer risk information. Nurses have been targeted to provide cancer risk assessment and counseling. To help prepare nurses for this role, a 5-day training in familial cancer risk assessment and counseling followed by a long-distance mentorship to support continued skill development in the work environment was conducted by Fox Chase Cancer Center, Philadelphia, PA. Methods. Four cohorts (N = 41) have completed the training and were randomized to either an immediate or delayed mentorship. A formative evaluation assessed the nurse’s ability to consult with other genetic health professionals and build self-efficacy in counseling skills via responses to questionnaire. A post-mentorship interview evaluated the usefulness, timing and length of the mentorship. Results. For both groups, there was a statistically significant improvement in self-efficacy for all skills from baseline to 6 months and an increased number of nurses consulting with genetic health professionals. All the nurses reported the value of the mentorship and those with less cancer risk counseling experience prior to the training needed support and resources for further skill and program development. Lessons learned from this formative evaluation are provided.     

Examen d'une erreur fondamentale dans la perception du hasard

Un des principaux facteurs expliquant le jeu excessif serait les perceptions erronées qu'entretiennent les individus concernant le hasard. Cet article vise à préciser les perceptions du joueur en analysant ses verbalisations lors de la production ou de la reconnaissance de suites aléatoires. Deux études empiriques ont été réalisées. E est prédit que la majorité des gens ont une perception erronée à l'égard du hasard et qu'il existe une relation entre le nombre d'issues possibles (par exemple deux lors du tir d'une pièce de monnaie ou six lors du tir d'un dé) et le nombre de verbalisations erronées faisant référence aux événements passés de la suite. Comme on le prévoyait, près de 70% des verbalisations sont l'expression d'une perception erronée, la plupart se référant à des liens de dépendance entre les événements de la suite. Cependant, l'augmentation du nombre d'issues possibles n'a pas d'effet significatif sur la proportion de perceptions erronées. La discussion met en relief les implications pratiques et théoriques des perceptions inadéquates des joueurs sur l'illusion du contrôle du jeu et des comportements excessifs en résultant.