REINFORCER ACCUMULATION IN A TOKEN-REINFORCEMENT CONTEXT WITH PIGEONS

Four pigeons were exposed to a token-reinforcement procedure with stimulus lights serving as tokens. Responses on one key (the token-production key) produced tokens that could be exchanged for food during an exchange period. Exchange periods could be produced by satisfying a ratio requirement on a second key (the exchange-production key). The exchange-production key was available any time after one token had been produced, permitting up to 12 tokens to accumulate prior to exchange. Token accumulation, measured in terms of both frequency (percent cycles with accumulation) and magnitude (mean number of tokens accumulated), decreased as the token-production ratio increased from 1 to 10 across conditions (with exchange-production ratio held constant), and increased as the exchange-production ratio increased from 1 to 250 across conditions (with token-production ratio held constant). When tokens were removed, accumulation decreased markedly compared to conditions with tokens and the same schedules. These data show that token accumulation is an orderly function of token-production and exchange-production schedules, and they are broadly consistent with a unit-price model based on local and global responses per reinforcer.     

Can we be (and stay) friends? Remaining friends after dissolution of a romantic relationship

Although many individuals report being friends with their ex-romantic partners (Wilmot, Carbaugh, & Baxter, 1985), the literature regarding post-romantic friendships is very limited. We investigated whether satisfaction in the dissolved romantic relationship could predict post-romantic friendships and friendship maintenance. We found that the more satisfied individuals were during the dissolved romance, the more likely they were to remain friends and the more likely they were to engage in friendship maintenance behaviors. We also found that friendship maintenance fully mediated the association between past romantic satisfaction and current friendship satisfaction.     

Aggression against middle and high school teachers: Duration of victimization and its negative impacts

Prior research indicates that student aggression against teachers is widespread, and it has negative impacts on victimized teachers’ emotional and physical well-being and job performance. However, little is known about the relationship between the recency and duration of victimization and teachers’ thoughts about quitting the teaching profession and related job dissatisfaction and disconnectedness to school. Analyses of data from a longitudinal study of 1,236 US teachers fills these gaps. The study found that many teachers experienced theft/vandalism and sexual harassment victimization that was limited to just 1 year. In contrast, sizeable proportions of teachers experienced verbal abuse and nonphysical contact aggression that occurred over 2 years. Multiple regression analyses showed that teachers who reported recent or multiyear victimization had lower levels of connectedness to school, less job satisfaction, and more thoughts about ending their teaching careers. These results may indicate that unless victimization recurs, negative effects of victimization are contemporaneous and are less likely to persist. Additional research is needed to examine victimization over longer than 2 years, investigate the effects of the frequency of different types of aggression against teachers, and identify school policies and interventions that weaken the connection of victimization to negative outcomes.     

Outcomes of teen parenting programs in New Mexico

Although teen pregnancy rates in the U.S. have recently declined, the need for programs for pregnant and parenting teens remains. This report presents information from 53 programs that served pregnant and parenting teens in New Mexico between 1997 and 2000. Data on 3,194 teens, including their characteristics, the services they received, and several key outcomes, are examined. These data indicate that the programs were successful in promoting educational attainment as well as gains in employment. Prevalence of late prenatal care and low birth weight babies was lower than statewide averages, and the rate of repeat pregnancy was lower than that reported by many other programs. How these programs achieved these results is discussed.     

Ethics for all: Differences across scientific society codes

Ethics codes of a number of scientific societies across different disciplines promulgate ethical standards for responsible conduct in research and other professional activities. The content of these codes of ethics are compared on key dimensions of research, service or practice, and teaching in terms of the range and specificity of the activities these codes cover, and in the degree to which they are educational, aspirational or regulatory in purpose. The role of professional associations in educating, regulating, monitoring, and sanctioning their membership is also discussed. An earlier version of this paper was presented at the AAAS-Office of Research Integrity (ORI) meeting in Washington DC on the theme: “The Role and Activities of Scientific Societies in Promoting Research Integrity” held on April 10–11, 2000.     

career concerns of unemployed u.s. war veterans: suggestions from a cognitive information processing approach

The authors examined U.S. war veterans' career concerns (e.g., interests, personality, barriers, career thoughts) to provide possible avenues for research‐based and theory‐driven intervention. The veterans who participated in the study were receiving mental health, substance abuse, and vocational services at a residential facility. Participants were found to have interests in all RIASEC (J. L. Holland, B. A. Fritzsche, & A. B. Powell, 1994; J. L. Holland & G. D. Gottfredson, 1994) interest areas, and negative career thinking was found to be related to a variety of negative indicators. Suggestions are provided for working with veterans using the Cognitive Information Processing approach to career decision making.     

Social and emotional functioning following bilateral and unilateral neurosurgical prefrontal cortex lesions

Alterations in emotional and social functioning such as impaired ability to recognize emotions in others, a lack of empathy and poor insight have commonly been reported following prefrontal cortex damage. This study sought to investigate the subtleties of such difficulties in 34 individuals with discrete unilateral and bilateral neurosurgical lesions encroaching on the orbitofrontal, medial, and dorsolateral regions of the prefrontal cortex. A specifically devised self‐ and informant report measure, the social‐emotional questionnaire was used to examine five factors of functioning: emotion recognition; empathy; social conformity; antisocial behaviour; and sociability. There were some specific significant differences between the clinical and control groups' informant‐ratings in certain domains of social and emotional functioning. Individuals with damage involving the orbitofrontal region were reported to display elevated levels of antisocial behaviour. Individuals with bilateral orbitofrontal lesions were rated as showing significantly reduced social and emotional functioning in comparison with individuals with unilateral lesions and controls. In addition, individuals with bilateral lesions had significantly less insight overall regarding their social‐emotional abilities. The right unilateral lesion group showed significantly less insight into their abilities to recognize emotion in others in comparison with the left unilateral group. In conclusion, these results suggest that specific social‐emotional and insight deficits may form separate constellations of impairment. The findings also indicate that marked changes in social and emotional functioning are more likely following bilateral damage, and unilateral lesions do not inevitably lead to impairments.     

Remembering Early Childhood: How Much, How, and Why (or Why Not)

In this article, we consider recent research on three questions about people's memories for their early childhood: whether childhood amnesia is a real phenomenon, whether implicit memories survive when explicit memories do not, and why early episodic memories are sketchy. The research leads us to form three conclusions. First, we argue that childhood amnesia is a real phenomenon, as long as the term is defined clearly. Specifically, people are able to recall parts of their lives from the period between ages 2 and 5 years, but they recall less from that period than from other periods. Second, we conclude that implicit memories from early childhood may be evident even when explicit memories are not, a finding that suggests early experience may affect behavior in ways that people do not consciously recognize. Third, we argue that although young children are well known to be wonderfully efficient learners of semantic information, they have difficulty in either encoding or retrieving the interlinked aspects of events that lend them their autobiographical character. Although more evidence is needed, the relative lack of episodic memories of early childhood may be linked to maturation of prefrontal cortex.     

"Feminism Lite?" Feminist Identification, Speaker Appearance, and Perceptions of Feminist and Antifeminist Messengers

Drawing on a communications model of persuasion ( Hovland, Janis, & Kelley, 1953 ), this study examined the effect of target appearance on feminists' and nonfeminists' perceptions of a speaker delivering a feminist or an antifeminist message. One hundred three college women watched one of four videotaped speeches that varied by content (profeminist vs. antifeminist) and target appearance ("feminine" vs. "masculine"). Self-identified feminists responded more favorably to a profeminist message when it was presented by a feminine than a masculine-appearing speaker and expressed less feminist attitudes after viewing a masculine-appearing feminist speaker. Nonfeminists' evaluations did not vary as a function of speaker appearance or message content. Implications for the communication of feminist ideology are discussed.