Differential acquisition of lever pressing in inbred and outbred mice: comparison of one-lever and two-lever procedures and correlation with differences in locomotor activity

Recent progress in mouse genetics has led to an increased interest in developing procedures for assessing mouse behavior, but relatively few of the behavioral procedures developed involve positively reinforced operant behavior. When operant methods are used, nose poking, not lever pressing, is the target response. In the current study differential acquisition of milk-reinforced lever pressing was observed in five inbred strains (C57BL/6J, DBA/2J, 129X1/SvJ, C3H/HeJ, and BALB/cJ) and one outbred stock (CD-1) of mice. Regardless of whether one or two levers (an "operative" and "inoperative" lever) were in the operant chamber, a concomitant variable-time fixed-ratio schedule of milk reinforcement established lever pressing in the majority of mice within two 120-min sessions. Substantial differences in lever pressing were observed across mice and between procedures. Adding an inoperative lever retarded acquisition in C57BL/6J, DBA/2J, 129X1/SvJ, and C3H/HeJ mice, but not in CD-1 and BALB/cJ mice. Locomotor activity was positively correlated with number of lever presses in both procedures. Analyses of durations of the subcomponents (e.g., time to move from hopper to lever) of operant behavior revealed further differences among the six types of mice. Together, the data suggest that appetitively reinforced lever pressing can be acquired rapidly in mice and that a combination of procedural, behavioral, and genetic variables contributes to this acquisition.     

Variation, repetition, and choice

Experiment 1 investigated the controlling properties of variability contingencies on choice between repeated and variable responding. Pigeons were exposed to concurrent-chains schedules with two alternatives. In the REPEAT alternative, reinforcers in the terminal link depended on a single sequence of four responses. In the VARY alternative, a response sequence in the terminal link was reinforced only if it differed from the n previous sequences (lag criterion). The REPEAT contingency generated low, constant levels of sequence variation whereas the VARY contingency produced levels of sequence variation that increased with the lag criterion. Preference for the REPEAT alternative tended to increase directly with the degree of variation required for reinforcement. Experiment 2 examined the potential confounding effects in Experiment 1 of immediacy of reinforcement by yoking the interreinforcer intervals in the REPEAT alternative to those in the VARY alternative. Again, preference for REPEAT was a function of the lag criterion. Choice between varying and repeating behavior is discussed with respect to obtained behavioral variability, probability of reinforcement, delay of reinforcement, and switching within a sequence.     

On the existence and uniqueness of JML estimates for the partial credit model

A necessary and sufficient condition is given in this paper for the existence and uniqueness of the maximum likelihood (the so-called joint maximum likelihood) estimate of the parameters of the Partial Credit Model. This condition is stated in terms of a structural property of the pattern of the data matrix that can be easily verified on the basis of a simple iterative procedure. The result is proved by using an argument of Haberman (1977). The author wishes to thank the Editor and the anonymous reviewers for their comments that helped to substantially improve the final version of this paper. This research was supported in part by a MURST grant (ex 60%).     

Studies of Work: Achieving Hybrid Disciplines in IT Design and Management Studies

We explore the relationship between ethnomethodology (EM), ethnography and the needs of managers and designers in industry, considering both ethnomethodological and industrial criteria of adequacy and explicating their relationship through the concept of “audience.” We examine a range of studies in this light, with a view to their possible candidacy as hybrid studies and identify three types of application of EM studies of work: market research, design, and business improvement. Application in the first of these fields we dub “anthropological,” in that it consists in studying and reporting back on the ways of exotic people (customers). This is the application most commonly found in studies of computer supported co-operative work (CSCW). A second CSCW application, “technomethodology,” involves the introduction of EM concepts into the design process. A further application, dubbed “holding-up-a-mirror,” involves reporting back to members of a setting upon their own activities. We argue that technomethodology and holding-up-a-mirror both offer the possibility of creating hybrid disciplines. We consider the objection that improvement and design involve the introduction of value judgements that threaten the practice of EM indifference, arguing that action research can serve as a guarantee of unique adequacy (UA) by testing the researcher’s understanding as analysis in action in the setting. Furthermore, the standard of reporting required by the UA criterion contributes to the effectiveness of proposed solutions.     

Bilateral Art: Integrating Art Therapy,Family Therapy,and Neuroscience

This paper describes the systemic use of a neurologically-based art therapy modality—bilateral art—that engages both dominant and non-dominant hands in the process of creating images in response to opposing cognitions or feelings. It describes both neuroscience and family therapy perspectives that argue for the use of bilateral art. A specific protocol for bilateral art therapy is provided along with a case study demonstrating integration of the protocol into the systemic treatment of a young family. Carole M. McNamee, PhD, is Research Professor and Clinical Associate, Director of the Arts in Healthcare Project, The Family Therapy Center, Department of Human Development, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 (cmcnamee@vt.edu).     

Indian Women’s Experience of a Narrative Intervention Using Art And Writing*

International and minority populations tend to underutilize mental health services, including marriage and family therapy. Models of marriage and family therapy developed in the West may reflect Western values and norms inappropriate for diverse cultural contexts. This article presents an exploratory, qualitative study of a narrative therapy approach with Asian Indian women. This study adds to the small body of narrative-based empirical studies, and has a unique focus on intercultural applications and the experience of participants. Participant experience was examined along four phenomenological dimensions. Findings indicate the suitability of narrative interventions and nontraditional treatment delivery for this population.*This research was presented in 2004 at the annual conference of the American Association for Marriage and Family Therapy.     

Communication flow and change theory within a family therapy supervision model

This article portrays a model of family therapy clinical supervision using change theory that is most appropriate for use with the videotape, audiotape, case presentation and debriefing from the live session. The most powerful tool during this process is that of communication and assessment of change theorys tools of confidence and conviction. The concepts presented are meant to add an additional dimension to family therapy supervision in cooperation of other theories, not as an end in themselves.Special thanks to Ms. Geri Koncilja of the Informational Technology Center at Colorado State University, Pueblo for illustration and graphic assistance.     

SK-克雷佩林心理测验--一种客观性人格测验的研究和编制

本研究遵循克雷佩林连续加算法的基本原则,充分吸收内田一克雷佩林心理测验的长处,参照其客观化的作业方式和操作方法,并加以改进,研究并编制出一套既科学又客观的连续加法运算作业测验,以编制者的名义命名为SK-克雷佩林心理测验。并根据作业曲线的变化特征提出了“作业商数”这一客观化指标,可以对受测者作业曲线的总体分布以及与标准作业曲线的符合或偏差程度有大致的了解,并由此推断个体心理机能各方面基本倾向是比较协调还是略有偏差等。     

Who's in Charge?: Coparenting in South and Southeast Asian Families

In light of the evolving roles of parents and the involvement of extended family within Asian cultures, the traditionally Western dyadic coparenting construct must be reconceptualized to include not only the coparenting relationship, but also other caregivers within the coparenting network. Theoretical and empirical evidence on coparental systems are discussed and two studies from South and Southeast Asian cultures are presented to highlight subcultural variations in cocaregiving networks. Results indicated that mothers were the primary caregivers across both cultural contexts. Extended family members assumed important coparental responsibilities in both cultural contexts. These findings highlight the need to reconceptualize and expand the dyadic coparental unit to include extended family members. We also discuss the relevance of the broader coparental network in examining the Asian childs education as well as cognitive and socioemotional development.     

Enhancing the effects of extinction on attention-maintained behavior through noncontingent delivery of attention or stimuli identified via a competing stimulus assessment

Recent research has shown that the noncontingent delivery of competing stimuli can effectively reduce rates of destructive behavior maintained by social-positive reinforcement, even when the contingency for destructive behavior remains intact. It may be useful, therefore, to have a systematic means for predicting which reinforcers do and do not compete successfully with the reinforcer that is maintaining destructive behavior. In the present study, we conducted a brief competing stimulus assessment in which noncontingent access to a variety of tangible stimuli (one toy per trial) was superimposed on a fixed-ratio 1 schedule of attention for destructive behavior for individuals whose behavior was found to be reinforced by attention during a functional analysis. Tangible stimuli that resulted in the lowest rates of destructive behavior and highest percentages of engagement during the competing stimulus assessment were subsequently used in a noncontingent tangible items plus extinction treatment package and were compared to noncontingent attention plus extinction and extinction alone. Results indicated that both treatments resulted in greater reductions in the target behavior than did extinction alone and suggested that the competing stimulus assessment may be helpful in predicting stimuli that can enhance the effects of extinction when noncontingent attention is unavailable. DESCRIPTORS: Attention-maintained problem behavior, competing stimuli, extinction, functional analysis, noncontingent reinforcement