Training domestic dogs (Canis lupus familiaris) on a novel discrete trials odor-detection task

Dogs can be trained to reliably detect a wide variety of odors. Little scientific research, however, has been published on the rate at which dogs can learn to detect an odor, the variables influencing this rate, and how this rate may vary across dogs. In two experiments, we developed a procedure that allows the study of individual differences in the acquisition of an odor detection task in dogs. We demonstrate that differential reinforcement can be used to train a rooting response in a bin under the control of a novel odorant in discrete trials. In initial testing, we showed that as a group, twenty dogs performed significantly above chance within 24 trials, with two dogs meeting an individual criterion for above chance performance. In a follow-up experiment, we compared burying accessible food inside the target bin (with inaccessible food in the non-target bin) to the experimenter delivering food by hand following correct responses. We assessed the effect of this procedural variation on both an odor discrimination and a visual discrimination. Dogs learned faster on the odor task when the experimenter delivered food, compared to when food was placed directly in the bins. Performance on the visual task was lower than on the odor task and was unaffected by how food was delivered. Our discrete-trials procedure with experimenter-delivered food may be a useful method to study rapid acquisition of an odor-detection in dogs.     

Discrimination of Visual Patterns as a Function of Motivation and Frequency of Reinforcement

The influence of the content of statements regarding delay and the level of role involvement (free choice of verbalization condition, assignment to verbalization condition, or passive listening to statement) on self-control in 98 preschool boys and girls was investigated in a task in which the child's possession of accumulating candy rewards was made contingent upon the child's stopping further accumulation. Children who chose to verbalize the task-centered utterance waited longer before taking the rewards than did the children in the three conditions involving reward-centered statements. Children who were told to use the task-centered statement or who passively heard it waited longer than did children who were told to use the reward-centered statement or who passively heard it. Children who chose the reward-centered statement waited less than children in the other two reward-centered conditions. Children given no direction regarding what to do during the waiting period delayed less than children in the task-centered conditions and they delayed about the same as children in the reward-centered groups, suggesting that preschoolers spontaneously employed delay plans which did not maximally facilitate self-control.     

Activity under Low Motivational Levels as a Function of the Method of Manipulating the Deprivation Period

Boys and girls in Grades 4, 6, and 8 were presented a 48-word list, in which each item was associated with a 5¢, 3¢, or l¢ reward, in order to test incentive effects on storage by means of a forced choice recognition paradigm assumed to minimize retrieval effects. Results showed (a) higher probabilities of recognition for words associated with higher incentive values, (b) serial position effects, and (c) a suggestive developmental progression in recognition performance. Differential reward influences upon storage and serial position were interpreted in terms of two-process memorial and incentive theories.     

From scapegoating to thinking and finding a home: delivering therapeutic work in schools

This paper discusses how the child psychotherapist's core skills can be usefully applied in a school setting. It outlines some of the important policy changes that have necessitated a move towards delivering therapeutic work in community settings such as schools. It is argued that the role of the child psychotherapist in schools has much in common with the role played by the psychotherapist in a therapeutic community. The paper suggests that therapy in schools is in many ways less simple than therapy in clinic settings, and in particular it is often unclear who exactly the client is and at what level to intervene when a referral is made. The referred patient is not necessarily the ‘problem’, so that the child psychotherapist must be prepared to tackle issues in the system to ensure that splitting and projection are reduced, and systems around children can become more containing. Clinical vignettes and one main clinical illustration are used to try to illustrate these points.     

Swinging Around Stigma: Gendered Marketing of Swingers’ Websites

Most research on swingers focus on the participants of this lifestyle. While research has examined swingers from a relational perspective, few, if any, have specifically examined the sources that facilitated swingers’ networks. In this paper, we are interested in how websites promote themselves and manage such a stigmatized activity. Specifically, we examine what aspects of swinging these websites focus on in order to attract members. Our findings indicate that these websites employ strategies that do not confront the stigma directly. In fact, this approach in and of itself is another strategy to swing around stigma. In addition, these websites are gendered and clearly target heterosexual men.     

Effects of cultural themes in psychotic symptoms on the diagnosis of schizophrenia in African Americans

Cultural themes focusing on race-related issues and religiosity were identified via content analysis in the delusions and hallucinations of a sample of 118 African American psychiatric patients. The purpose of the study was to determine whether cultural themes in psychotic symptoms influence the diagnosis from different sources (i.e., chart, SCID, and best estimate) of schizophrenia for Black patients. It was hypothesized that the best estimate diagnoses of cultural experts would diagnose schizophrenia in African Americans more frequently when they exhibit race-related themes in their psychotic symptoms. It was also hypothesized that diagnosis of the paranoid subtype would yield a stronger difference among the sources than the broader category of schizophrenia. The results did not support the hypotheses. Implications for understanding the relationship between culture and psychosis among African Americans are discussed.     

Reference groups: A missing link in career studies

Careers unfold within and are bound by multiple social contexts. Newer career concepts have postulated a growing need for personal agency in overcoming structural constraints, especially organizational and occupational boundaries. As a consequence, research has focused more on the individual than on contextual factors. In order to answer recent criticism of this unbalanced view we argue that the impact of reference groups needs to be better understood, both as social drivers of agentic behavior and as social constraints that, for instance, reduce the permeability of boundaries. Drawing on identity theories and social network literature we suggest a classification of reference groups in which social domains (e.g., organization, occupation, family, friends), types of groups (known people, abstract social categories), and functions (normative, comparative, supportive) are distinguished. The reference group classification is employed to discuss extant career research and to propose three directions for future research: a) Fuller consideration of different social domains beyond the employing organization for a more complete understanding of social influences in contemporary careers; b) exploration of the possibly growing relevance of abstract social categories as referents, especially for subjective career success; and c) systematic analysis of the interaction between normative, comparative, and supportive functions of individuals' social networks. Across these themes, possible negative influences of reference groups and effects of imposed rather than chosen referents are also to be considered. Implications of the suggested research for better understanding the interaction between structure and agency in shaping careers and career identity are discussed.