The ontogenesis of lateralized behavior in the domestic cat, Felis silvestris catus

For the first time, the development of paw preferences in the domestic cat, Felis silvestris catus, is explored. Twelve cats were tested at ages 12 weeks, 6 months, and 1 year on a challenge requiring them to use one of their paws to retrieve food. To control for repeated testing of the same cats at different ages, the subjects' paw preferences were compared with those of cats tested just once, at 6 months (n = 11) or 1 year (n = 14) of age. Analysis revealed a significant effect of age on the distribution of cats' paw preferences. Cats were significantly more likely to be ambilateral than paw preferent at 12 weeks and at 6 months but more likely to display a lateral bias in paw use at 1 year. There was a significant positive correlation between cats' paw preferences at 6 months and at 1 year. Lateralized behavior was strongly sex related. Females had a greater preference for using their right paw; males were significantly more inclined to adopt their left. Analysis revealed no significant difference in the direction or strength of paw preferences of cats tested longitudinally or cross-sectionally at 6 months or 1 year of age. Findings indicate that cats develop paw preferences by 1 year and hint at a relative stability in preferred paw use over time. The strong sex effect observed strengthens the case for the influence of a biological mechanism in the emergence of motor asymmetry in cats.     

Teaching psychodynamics in the twenty-first century

A lack of clarity in psychoanalytic education has negatively affected the educational experience of candidates now in training and makes it difficult for prospective candidates to understand the field. Three basic educational concepts--learning objectives, operationalizing, and adult learning theory--can help psychoanalysts teach and assess their students in a clearer, more objective way. Using these concepts has broad implications for both psychodynamic and psychoanalytic education in the twenty-first century.     

Dissociating Basal Forebrain and Medial Temporal Amnesic Syndromes: Insights from Classical Conditioning

In humans, anterograde amnesia can result from damage to the medial temporal (MT) lobes (including hippocampus), as well as to other brain areas such as basal forebrain. Results from animal classical conditioning studies suggest that there may be qualitative differences in the memory impairment following MT vs. basal forebrain damage. Specifically, delay eyeblink conditioning is spared after MT damage in animals and humans, but impaired in animals with basal forebrain damage. Recently, we have likewise shown delay eyeblink conditioning impairment in humans with amnesia following anterior communicating artery (ACoA) aneurysm rupture, which damages the basal forebrain. Another associative learning task, a computer-based concurrent visual discrimination, also appears to be spared in MT amnesia while ACoA amnesics are slower to learn the discriminations. Conversely, animal and computational models suggest that, even though MT amnesics may learn quickly, they may learn qualitatively differently from controls, and these differences may result in impaired transfer when familiar information is presented in novel combinations. Our initial data suggests such a two-phase learning and transfer task may provide a double dissociation between MT amnesics (spared initial learning but impaired transfer) and ACoA amnesics (slow initial learning but spared transfer). Together, these emerging data suggest that there are subtle but dissociable differences in the amnesic syndrome following damage to the MT lobes vs. basal forebrain, and that these differences may be most visible in non-declarative tasks such as eyeblink classical conditioning and simple associative learning.     

The Animus: Help or Hindrance?

The “masculine” side of the woman’s psyche is seen as carrying two kinds of energy: drive, aggressiveness, and self-assertion as well as objectivity, consciousness, and concern with meaning and spiritual values. The need for (and problems with) becoming aware of these basic energies are discussed, using many contemporary examples.     

The Meaning of Brand Names to Children: A Developmental Investigation

We explored the way that children use brand names in making consumer judgments. Brand names can serve as a simple perceptual cue that identifies a product as one people are familiar with or one they associate with certain perceptual features. Brands can also be associated with symbolic or conceptual meanings, conveying status, prestige, or trendiness. We proposed that young children relate to brands on a perceptual level, whereas older children relate to brands on a conceptual basis as well. We examined this proposition in an experiment conducted with children 8,12, and 16 years of age. Participants were asked to evaluate an advertised product (e.g., athletic shoes) with a familiar brand name that was either popular (e.g., Nike^®) or less popular (e.g., Kmart^®). The advertised product was physically identical in both cases, allowing us to explore whether the brand name had meaning for children apart from its name familiarity or perceptual features. The use of conceptual brand meanings was assessed by asking participants to make several types of brand‐related judgments including evaluations of the advertised product, impressions of the owners of the advertised product, and evaluations of possible extensions of the popular brand name advertised. Results indicate that by the time children reach 12 years of age, they use brand names as an important conceptual cue in consumer judgments.     

Measuring direct and indirect aggression: behavior of is there a response bias?

Critics of self-report methods suggest that participants are likely to underreport their own negative behaviors given concerns about social desirability. The current study examined the problem of self-report bias by comparing individuals' estimates of their own and others' aggressive behavior. Undergraduate students (95 women, 50 men) completed the Richardson Conflict Response Questionnaire with regard to either their own behavior or that of another person of the same sex. As expected, participants reported significantly less aggression for themselves than for others. However, self and other ratings showed the same pattern of sex differences. These results suggest that, although individuals may underreport their own aggressive behaviors, this tendency may not affect relationships among variables.     

Predicting Re-Victimization of Battered Women 3 Years After Exiting a Shelter Program

This study examined interpersonal and ecological predictors of re-victimization of a sample of women with abusive partners. All women (N = 124) had sought refuge from a battered women’s shelter 3 years earlier, and half the sample had been randomly assigned to receive free, short-term advocacy services immediately upon exit from the shelter. Results 2 years post-intervention revealed positive change in the lives of participants (C. M. Sullivan & D. Bybee, 1999), including a decrease in abuse for women who had worked with advocates. The current study examined intervention effects 3 years after the program ended, as well as other predictors of re-abuse. Nineteen percent of the original sample had experienced domestic violence between 2 and 3 years after shelter exit (65% by current partners, 35% by ex-partners). The advocacy program’s effect on risk of re-victimization did not continue 3 years post-intervention. However, having worked with an advocate 3 years prior continued to have a positive impact on women’s quality of life and level of social support. The risk of being abused 3 years post-shelter stay was exacerbated by a number of factors present 1 year prior, including women’s (1) having experienced abuse in the 6 months before that point; (2) having difficulties accessing resources; (3) having problems with the state welfare system; and (4) having people in their social networks who made their lives difficult. Women were at less risk of abuse if, 1 year earlier, they (1) were employed; (2) reported higher quality of life; and (3) had people in their networks who provided practical help and/or were available to talk about personal matters. These findings support the hypothesis that access to resources and social support serve as protective factors against continued abuse.