Computational Representation of Practical Argument

In this paper we consider persuasion in the context of practical reasoning, and discuss the problems associated with construing reasoning about actions in a manner similar to reasoning about beliefs. We propose a perspective on practical reasoning as presumptive justification of a course of action, along with critical questions of this justification, building on the account of Walton. From this perspective, we articulate an interaction protocol, which we call PARMA, for dialogues over proposed actions based on this theory. We outline an axiomatic semantics for the PARMA Protocol, and discuss two implementations which use this protocol to mediate a discussion between humans. We then show how our proposal can be made computational within the framework of agents based on the Belief-Desire-Intention model, and illustrate this proposal with an example debate within a multi agent system.     

Vicarious traumatization and secondary traumatic stress: A research synthesis∗

Vicarious traumatization (VT) refers to harmful changes that occur in professionals’ views of themselves, others, and the world, as a result of exposure to the graphic and/or traumatic material of their clients. Secondary traumatic stress (STS) refers to a set of psychological symptoms that mimic post-traumatic stress disorder, but is acquired through exposure to persons suffering the effects of trauma. Numerous studies have sought to identify correlates of both VT and STS, yet there still exists a lack of conceptual clarity in the literature about VT, STS, and the related constructs of burnout and compassion fatigue. This has made it difficult to use the literature to inform practice and training. This study clarifies the definitions of VT and STS and uses levels of evidence analysis to synthesize the research findings to date. Originally planned as a meta-analysis, the study was re-designed as methodological issues in the literature became apparent that would call into question the validity of a meta-analysis. The current method of analysis documents the degree of evidence for the most commonly researched factors that have been researched as possible contributors to the development of both VT and STS, synthesizing the findings of published research and dissertations written in the English language from 1994–2003. Findings indicate that persuasive evidence exists for personal trauma history, reasonable evidence for perceived coping style, and some evidence for supervision experiences, as important predictors of VT. Persuasive evidence for amount of exposure to trauma material and reasonable evidence for personal trauma history are indicated as important in the development of STS. Limitations of the current study and directions for further research are discussed.     

Measurement of acoustic startle response in mice

Apparatus for measurement of acoustic startle response in mice is described. The technique utilizes a spring suspended lever, commercially available strain-gauge transducer, and polygraph. Individual startle responses are recorded as upward (flexion) and downward (extension) pen deflections, the force of either component being linearly related to the amplitude of the vertical pen deflections. The apparatus, with minor modifications, may be used to measure startle responses in larger rodents.     

A comparison of two approaches to education about carrier testing for cystic fibrosis

We tested the efficacy of two types of educational materials for genetic counseling: a traditional information brochure and one adding a role model story. Brochures were alternated weekly at a prenatal genetics center. Subjects were asked to read the brochure and fill out a questionnaire covering demographics and variables from the health belief model (impact, barriers, motivation, susceptibility, knowledge, severity). A group of 409 pregnant women and 251 male partners participated. Study design was quasiexperimental, using a post-test only comparison group. The brochure with modeling enhanced the perception of both risk and the severity of the disease and was inversely associated with the assessment of barriers, but did not directly impact on the decision to pursue testing; only 12% chose to be tested, with no significant differences between groups. While suggestive, the study is not confirmatory and should be repeated with a more heterogenous group of women.     

The effect of verbal elaborations on memory in young and older adults

The Stein paradigm was used to examine the circumstances under which verbal elaborations enhance memory in young and older adults. Subjects studied target adjectives that were embedded in one of three sentence contexts that varied in elaboration of the subject-adjective relationship: (1) nonelaborated base sentences; (2) base sentences with semantically consistent, but arbitrary verbal, elaborations; and (3) base sentences with explanatory verbal elaborations that clarified the significance of the subject-adjective relationship. The presence of the elaborations was varied at encoding and retrieval, and cued recall of the target adjectives was tested with incidental and intentional learning procedures. In Experiments 1A and 1B, explanatory elaborations at encoding and retrieval yielded the largest memorial facilitation for both young and older adults, and the benefit was comparable for the incidental and intentional learning measures. In Experiment 2, age-related differences in recall were minimal with explanatory elaborations at encoding and retrieval, but larger age differences occurred in the nonelaborated comparison conditions. In Experiment 3, explanatory elaborations present at encoding but not at retrieval enhanced recall when the original Stein stimuli were used, but not with the present stimuli. The implications of these results with regard to the mnemonic efficacy of verbal elaborations for young and older adults are discussed.     

The Impact of Gender on the Review of the Curricula Vitae of Job Applicants and Tenure Candidates: A National Empirical Study

The purpose of this study was to determine someof the factors that influence outside reviewers andsearch committee members when they are reviewingcurricula vitae, particularly with respect to the gender of the name on the vitae. The participants inthis study were 238 male and female academicpsychologists who listed a university address in the1997 Directory of the American PsychologicalAssociation. They were each sent one of four versions of acurriculum vitae (i.e., female job applicant, male jobapplicant, female tenure candidate, and male tenurecandidate), along with a questionnaire and aself-addressed stamped envelope. All the curricula vitaeactually came from a real-life scientist at twodifferent stages in her career, but the names werechanged to traditional male and female names. Althoughan exclusively between-groups design was used to avoidsparking genderconscious responding, the resultsindicate that the participants were clearly able todistinguish between the qualifications of the jobapplicants versus the tenure candidates, as evidenced bysuggesting higher starting salaries, increasedlikelihood of offering the tenure candidates a job,granting them tenure, and greater respect for theirteaching, research, and service records. Both men andwomen were more likely to vote to hire a male jobapplicant than a female job applicant with an identicalrecord. Similarly, both sexes reported that the male job applicant had done adequate teaching,research, and service experience compared to the femalejob applicant with an identical record. In contrast,when men and women examined the highly competitive curriculum vitae of the real-life scientist whohad gotten early tenure, they were equally likely totenure the male and female tenure candidates and therewas no difference in their ratings of their teaching, research, and service experience. There was nosignificant main effect for the quality of theinstitution or professional rank on selectivity inhiring and tenuring decisions. The results of this study indicate a gender bias for both men and womenin preference for male job applicants.     

Phonological Similarity and Trace Degradation in the Serial Recall Task: When CAT helps RAT,but not MAN

Phonological similarity is observed to affect serial recall detrimentally when correct-in-position scoring is used. Two experiments investigated the role of item and position accuracy scoring of rhyming, similar nonrhyming, and dissimilar lists under immediate recall conditions; articulatory suppression; or a filled delay. In general, rhyme lists produced the best item recall but position accuracy was highest for dissimilar lists. The results are due to a category cueing effect improving item recall for rhyme lists in conjunction with a detrimental effect of phonological similarity on position accuracy.     

Spatial Error Detection and Assimilation Effects in Rapid Single and Bimanual Aiming Movements

In 2 experiments, spatial error detection capability and movement accuracy were investigated in both single and bimanual rapid aiming movements. In both experiments, right-handed college-age participants (N = 40 [Experiment 1]; N = 24 [Experiment 2]) used light, aluminum levers to make quick single and dual reversal movements in the sagittal plane in a time to reversal of 210 ms to either the same or different target locations involving identical (Experiment 1) or mirror-image (Experiment 2) movements. In Experiment 1, the shorter-distance limb overshot the target by 15-23&percent; when paired with a limb traveling at least 20 degrees farther, but no spatial assimilations were shown when movements differed by 20 degrees or less. In Experiment 2, the shorter-distance limb overshot 22-29&percent; when paired with a limb traveling 20 degrees farther, but spatial assimilations were not mitigated when both limbs moved to the same target position. Participants underestimated movement amplitude in all dual conditions but particularly when spatial assimilations were noted. Correlations between actual and estimated errors decreased from single to dual trials in both experiments. The findings suggest that spatial assimilations are caused by bimanual differences in movement amplitude, regardless of movement direction, and that individuals have greater difficulty identifying errors in simultaneous actions, especially when spatial assimilations are present, than identifying errors in single-limb actions.     

Addressing moral problems through practical reasoning

In this paper, following the work of Hare, we consider moral reasoning not as the application of moral norms and principles, but as reasoning about what ought to be done in a particular situation, with moral norms perhaps emerging from this reasoning. We model this situated reasoning drawing on our previous work on argumentation schemes, here set in the context of Action-Based Alternating Transition Systems. We distinguish what prudentially ought to be done from what morally ought to be done, consider what legislation might be appropriate and characterise the differences between morally correct, morally praiseworthy and morally excusable actions. We also describe an implementation which simulates this reasoning and discuss some issues arising from the simulation.