Reasoning and Explaining

When regimented in a certain natural way, the concepts of explanation and justification manifest a pattern of interrelations connected more or less systematically to their object. Besides its intrinsic interest, this pattern may give us some insight into the nature, source, and limits of the concept of argument.     

Best and Worst Professors: Gender Patterns in Students' Choices

Over 100 primarily White students described their best and worst professor. For best, female professors were chosen more by their female students and less by their male students than expected. There were no gender differences in choice of worst professors. The qualities that students criticize are similar for their male and female professors, mainly a lack of organization and clarity. Best professors most often are described as caring and knowledgeable, but other qualities vary as a function of professor or student gender. These findings suggest that more attention should be paid to gender dynamics in classroom teaching and in student evaluations.     

专家医生的知识结构及诊断推理方式

医学专长研究中“中间者效应”的发现,引发了研究者对专家医生知识结构的探讨。在“知识打包”的基础上,医生的临床知识以“疾病脚本”的方式组织起来。随着临床经验的增加,专家医生积累了丰富的疾病脚本。在临床诊断中,他们无需对病人所有的体征和症状进行仔细地和系统地分析,而是通过非分析性的推理方式——“模式识别”或“样例识别”便可自动激活与之匹配的疾病脚本,据此对病人做出迅速而准确的诊断。医学专长的本质就在于专家医生以“疾病脚本”的方式组织起来的知识结构。“适应性专长”代表了未来医学专长研究的新方向     

Expect the Best and Prepare for the Worst: Anticipatory Coping and Preparations for Y2K

The Y2K Bug, the programming glitch expected to derail computerized systems worldwide when the year changed from 1999 to 2000, provided a rich context for examining anticipatory coping and preparatory behaviors. In the last 2 months of 1999, 697 respondents completed an online survey of proactivity, worry about Y2K, dispositional optimism, primary and secondary control-oriented coping efforts, estimates of Y2K-related disruptions, and household preparations. Higher levels of proactivity, worry, and optimism were independently associated with greater self-reported preparations. These predictors were positively associated with greater primary control-oriented coping efforts, but showed differential relations to secondary control efforts, such as accepting the situation or trusting a higher power, especially among participants who thought the damage would be severe and lasting. Implications for understanding multiple ways of coping with potential stressors are discussed.

PERCEPTIONS OF POWER Female Executives' Descriptions of Power Usage by Best and Worst Bosses

This research examined the perceived use of power by women executive's best and worst bosses. Using a new methodology to measure French and Raven's (1959) and Raven's (1965) power bases, members of the National Association of Female Executives responded to a survey in which they evaluated the power bases of their best and worst bosses. Male bosses were more likely than female bosses to be identified as the worst boss, whereas females and males were equally likely to be identified as the best boss, although these women probably had far more male than female bosses.     

On the Role of Mathematics in Explaining the Material World: Mental Models for Proportional Reasoning

Contemporary psychological research that studies how people apply mathematics has largely viewed mathematics as a computational tool for deriving an answer. The tacit assumption has been that people first understand a situation, and then choose which computations to apply. We examine an alternative assumption that mathematics can also serve as a tool that helps one to construct an understanding of a situation in the first place. Three studies were conducted with 6th-grade children in the context of proportional situations because early proportional reasoning is a premier example of where mathematics may provide new understanding of the world. The children predicted whether two differently-sized glasses of orange juice would taste the same when they were filled from a single carton of juice made from concentrate and water. To examine the relative contributions and interactions of situational and mathematical knowledge, we manipulated the formal features of the problem display (e.g., diagram vs. photograph) and the numerical complexity (e.g., divisibility) of the containers and the ingredient ratios. When the problem was presented as a diagram with complex numbers, or “realistically” with easy numbers, the children predicted the glasses would taste different because one glass had more juice than the other. But, when the problem was presented realistically with complex numbers, the children predicted the glasses would taste the same on the basis of empirical knowledge (e.g., “Juice can't change by itself”). And finally, when the problem was presented as a diagram with easy numbers, the children predicted the glasses would taste the same on the basis of proportional relations. These complex interactions illuminate how mathematical and empirical knowledge can jointly constrain the construction of a new understanding of the world. We propose that mathematics helped in the case of successful proportional reasoning because it made a complex empirical situation cognitively tractable, and thereby helped the children construct mental models of that situation. We sketch one aspect of the mental models that are constructed in the domain of quantity—a preference for specificity—that helps explain the current findings.     

When choices give in to temptations: Explaining the disagreement among importance measures

Respondents’ overt statements of relative importance rarely correspond to weights derived from a regression analysis of their decisions. This paper conjectures that differential effects of high-level goals on importance beliefs and choices can explain these discrepancies. It is argued that the goal to justify decisions influences importance beliefs more than choices whereas the goal to assess preferences accurately affects choices more than importance beliefs. It is also argued that differential effects of high-level goals on importance statements and choices vary as a function of whether decision-maker controls the information flow and the extent of prior knowledge and experiences with choice options. These predictions were tested within the context of a contraceptive decision-making task. Choices among contraceptives made the justification goal salient to subjects by requiring tradeoffs between attributes that are either considered rational or tempting in making such decisions (e.g., health risks vs. pleasure/convenience). As predicted, subjects assigned larger importance weights to rational attributes in their subjective evaluations than in their choices whereas the impact of tempting attributes was stronger for choices than for subjective importance evaluations. Moreover, these observed discrepancies between importance measures were reduced in favor of rational attributes when subjects controlled the information flow and could not access their prior experiences. Overall, the results suggest that, although tempting attributes affect choices, decision makers appear to be unwilling to acknowledge the impact of tempting attributes on their decisions in judging attribute importance.     

On the Role of Biomedical Knowledge in Clinical Reasoning by Experts,Intermediates and Novices

In two studies the role of biomedical knowledge in the diagnosis of clinical cases was explored. Experiment 1 demonstrated a decrease in the use of biomedical knowledge with increasing expertise. This result appeared to be at variance with some findings reported in the literature (e.g., Lesgold, 1984), but supported those of others (e.g., Patel, Evans, & Groen, 1989). In Experiment 2, three possible explanations for this phenomenon were investigated: (1) rudimentation of biomedical knowledge, (2) inertia, and (3) encapsulation of biomedical knowledge under higher order concepts. Using a combined think-aloud and post-hoc explanation methodology, it was shown that experts have more in-depth biomedical knowledge than novices and subjects at intermediate levels of expertise. The findings generally support a three-stage model of expertise development in medicine consisting of acquisition of biomedical knowledge, practical experience, and integration of theoretical and experiental knowledge resulting in knowledge encapsulation.     

Instrumental Bias in Motivated Reasoning: More When More Is Needed

Decision makers must often make judgments in an environment in which they have a strong motivation to reach a particular conclusion. While normative theory would indicate that they should use available information to make their most accurate judgment without being influenced by the conclusion or outcome it may imply, evidence from the social judgment literature suggests that motivation does bias the judgment process. Specifically, decision makers motivated to support a particular conclusion tend to adopt information processing strategies most likely to yield the desired conclusion. We propose and empirically demonstrate two extensions to the motivation literature. First, we argue that motivated reasoning isinstrumental,meaning motivated decision makers bias their judgments more or less as needed to support the desired conclusion, subject to “reasonableness” constraints. Second, we propose that motivated decision makers exhibitconfidence bolsteringand thereby remain at least as confident as non-motivated decision makers in their biased estimates. We illustrate that motivated subjects even report confidence in utilizing these estimates outside the original motivating context. We investigate motivational effects within a business context involving forecasting, strategic decision making, and new product introductions. We explore the impact of motivation on quantitative forecasts and estimates, rather than on social judgments and perceptions. In addition, we go a step beyond the judgment phase to demonstrate that motivation influences choice.     

When contributions make a difference: Explaining order effects in responsibility attribution

In two experiments, we established an order effect in responsibility attributions. In line with Spellman (Journal of Experimental Psychology: General 126: 323-348, 1997), who proposed that a person's perceived causal contribution varies with the degree to which it changes the probability of the eventual outcome, Experiment 1 showed that in a team challenge in which the players contribute sequentially, the last player's blame or credit is attenuated if the team's result has already been determined prior to her acting. Experiment 2 illustrated that this attenuation effect does not overgeneralize to situations in which the experienced order of events does not map onto the objective order of events; the level of the last person's performance is only discounted if that person knew that the result was already determined. Furthermore, Experiment 1 demonstrated that responsibility attributions remain sensitive to differences in performance, even if the outcome is already determined. We suggest a theoretical extension of Spellman's model, according to which participants' responsibility attributions are determined not only by whether a contribution made a difference in the actual situation, but also by whether it would have made a difference had things turned out somewhat differently.     

When and How Different Motives Can Drive Motivated Political Reasoning

It is commonly assumed that the effectiveness of political messages depends on people's motivations. Yet, studies of politically motivated reasoning typically only consider what partisans generally might want to believe and do not separately examine the different types of motives that likely underlie these wants. The present research explores the roles of distinct types of motives in politically motivated thinking and identifies the conditions under which motivated reasoners are persuaded by political messages. Results of an experiment with a large, representative sample of Republicans show that manipulations inducing motivations for either (1) forming accurate impressions, (2) affirming moral values, or (3) affirming group identity each increased beliefs in and intentions to combat human-induced climate change, but only when also paired with political messages that are congruent with the induced motivation. We also find no evidence of a backlash effect even when individuals are provided with clearly uncongenial information and a motivation to reject it. Overall, our findings make clear that understanding when and why motivated political reasoning occurs requires a more complete understanding of both which motivations might be active among a group of partisans and how these motivations resonate with the messaging they receive.     

Experimenter Characteristics and Word Choice: Best Practices When Administering an Informed Consent

The present research seeks to better understand research conditions in laboratory research, with special attention paid to the informed consent process and experimenter characteristics. The first study tested the impact of language perspective and experimenter demeanor upon participant retention of the informed consent information, attitudes toward the research project, and performance on experimental tasks. The second study examined the impact of experimenter attire. Across the two studies, our results suggest that there was no impact of language perspective, whereas the number of other participants in the laboratory, experimenter attire, and experimenter demeanor influence participant behaviors in the laboratory.     

Books: Explaining the Unexplainable

You would do better to say, “Inexpressible and nameless is that which gives my soul agony and sweetness. ” May your virtue be too exalted for the familiarity of names, and if you must speak of her, then do not be ashamed to stammer of her.     

When You Care Enough to Do Your Very Best: Genetic Counselor Experiences of Compassion Fatigue

Compassion fatigue is a phenomenon that occurs when a caregiver feels overwhelmed by repeated empathic engagement with distressed clients (Figley, 2002). Research demonstrates its existence among nurses, physicians, and mental health professionals, but to date no published study has specifically investigated the nature and prevalence of compassion fatigue among genetic counselors. The present study was an initial attempt to identify and describe the phenomena in genetic counseling by conducting focus group interviews with 12 genetic counselors. Data analysis yielded several themes: a) compassion fatigue occurs and may compromise professional and personal functioning; b) prevalent triggers include delivering bad news and difficult patient issues (e.g., terminal illness, anger, psychopathology); c) effective coping strategies include consulting with colleagues, setting boundaries, and humor; and d) risk factors include personality characteristics and traumatic memories. Training, practice, and research recommendations are provided.     

You Get What You Need: An Examination of Purpose‐Based Inheritance Reasoning in Undergraduates,Preschoolers, and Biological Experts

This set of seven experiments examines reasoning about the inheritance and acquisition of physical properties in preschoolers, undergraduates, and biology experts. Participants (N = 390) received adoption vignettes in which a baby animal was born to one parent but raised by a biologically unrelated parent, and they judged whether the offspring would have the same property as the birth or rearing parent. For each vignette, the animal parents had contrasting values on a physical property dimension (e.g., the birth parent had a short tail; the rearing parent had a long tail). Depending on the condition, the distinct properties had distinct functions (“function‐predictive”) were associated with distinct habitats (“habitat‐predictive”), or had no implications (“non‐predictive”). Undergraduates' bias to view properties as inherited from the birth parent was reduced in the function‐ and habitat‐predictive conditions. This result indicates a purpose‐based view of inheritance, whereby animals can acquire properties that serve a purpose in their environment. This stance was not found in experts or preschoolers. We discuss the results in terms of how undergraduates' purpose‐based inheritance reasoning develops and relates to larger‐scale misconceptions about Darwinian evolutionary processes, and implications for biology education.