When high working memory capacity is and is not beneficial for predicting nonlinear processes

Predicting the development of dynamic processes is vital in many areas of life. Previous findings are inconclusive as to whether higher working memory capacity (WMC) is always associated with using more accurate prediction strategies, or whether higher WMC can also be associated with using overly complex strategies that do not improve accuracy. In this study, participants predicted a range of systematically varied nonlinear processes based on exponential functions where prediction accuracy could or could not be enhanced using well-calibrated rules. Results indicate that higher WMC participants seem to rely more on well-calibrated strategies, leading to more accurate predictions for processes with highly nonlinear trajectories in the prediction region. Predictions of lower WMC participants, in contrast, point toward an increased use of simple exemplar-based prediction strategies, which perform just as well as more complex strategies when the prediction region is approximately linear. These results imply that with respect to predicting dynamic processes, working memory capacity limits are not generally a strength or a weakness, but that this depends on the process to be predicted.     

Active route learning in virtual environments: disentangling movement control from intention, instruction specificity, and navigation control

Active navigation research examines how physiological and psychological involvement in navigation benefits spatial learning. However, existing conceptualizations of active navigation comprise separable, distinct factors. This research disentangles the contributions of movement control (i.e., self-contained vs. observed movement) as a central factor from learning intention (Experiment 1), instruction specificity and instruction control (Experiment 2), as well as navigation control (Experiment 3) to spatial learning in virtual environments. We tested the effects of these factors on landmark recognition (landmark knowledge), tour-integration and route navigation (route knowledge). Our findings suggest that movement control leads to robust advantages in landmark knowledge as compared to observed movement. Advantages in route knowledge do not depend on learning intention, but on the need to elaborate spatial information. Whenever the necessary level of elaboration is assured for observed movement, too, the development of route knowledge is not inferior to that for self-contained movement.     

Tests of the DRYAD theory of the age-related deficit in memory for context: not about context, and not about aging

Older adults exhibit a disproportionate deficit in their ability to recover contextual elements or source information about prior encounters with stimuli. A recent theoretical account, DRYAD, attributes this selective deficit to a global decrease in memory fidelity with age, moderated by weak representation of contextual information. The predictions of DRYAD are tested here in three experiments. We show that an age-related deficit obtains for whichever aspect of the stimulus subjects' attention is directed away from during encoding (Experiment 1), suggesting a central role for attention in producing the age-related deficit in context. We also show that an analogous deficit can be elicited within young subjects with a manipulation of study time (Experiment 2), suggesting that any means of reducing memory fidelity yields an interaction of the same form as the age-related effect. Experiment 3 evaluates the critical prediction of DRYAD that endorsement probability in an exclusion task should vary nonmonotonically with memory strength. This prediction was confirmed by assessing the shape of the forgetting function in a continuous exclusion task. The results are consistent with the DRYAD account of aging and memory judgments and do not support the widely held view that aging entails the selective disruption of processes involved in encoding, storing, or retrieving contextual information.     

Language is not neutral. Commentary about APA style

Some basic characteristics, not always explicit, of the editorial style proposed by the American Psychological Association (APA), and from the objections posed by some authors who maintain critical positions towards the use of this style, are reviewed, starting with the work of Madigan, Johnson, and Linton (1995) and the subsequent controversy. Starting with this review, problems related to underlying assumptions of the style, with ethical aspects of research, and with the epistemological positions defended by the different traditions of research are discussed. In the conclusions, a simpler differentiation between the scientific-technical and communicative-practical systems of enquiry is proposed, and an explicit commitment, in the text of the report, to the ethical responsibilities derived from the authorship and the development of the research.     

How (not) to think about mental action

I examine Galen Strawson's recent work on mental action in his paper, ‘Mental Ballistics or The Involuntariness of Spontaneity’. I argue that his account of mental action is too restrictive. I offer a means of testing tokens of mental activity types to determine if they are actional. The upshot is that a good deal more mental activity than Strawson admits is actional.     

The feedback withholding bias: Minority students do not receive critical feedback from evaluators concerned about appearing racist

How can we learn from our mistakes if we're unaware they exist? The present research tested the hypothesis that minority students receive less critical feedback on their written work from evaluators who are primarily externally motivated to inhibit their racial biases. Participants highlighted instances of good/bad writing in essays purportedly written by a White or a minority student. Results of two experiments showed that although participants provided equivalent amounts of positive feedback to both authors, they provided less negative feedback and gave higher grades to minority authors to the extent that they were externally but not internally motivated to respond without prejudice. This finding reveals that stigmatized students sometimes fail to receive the critical feedback necessary to identify areas needing improvement, particularly when evaluators are concerned about appearing prejudiced. The implications for educational equality are discussed.     

Inferences about others from their reports about themselves

Subjects in this study were asked to infer an attribute of a target person on the basis of his report about himself: Two informational determinants of such inferences were varied: (a) reliability of the report, i.e. the belief that the target person would correctly report events that had actually occurred and (b) diagnosticity of the actual events, i.e. the belief that the actual events are indicative of the attribute. Normative considerations require that the effect of diagnosticity be dependent on reliability so that as reliability increases, judgment should become less regressive, i.e. vary more as a function of events' diagnosticity. The results indicate that subjects employed a simple but inappropriate averaging rule in combining reliability and diagnosticity information. This rule, like many other simplifying judgmental heuristics, resulted in inferences that were more extreme than warranted by normative models. The inappropriate combination of reliability and diagnosticity information may thus contribute to observers' tendency to over-attribute personal characteristics to others.     

A Framework for Riddles about Truth that do not involve Self-Reference

In this paper, we present a framework in which we analyze three riddles about truth that are all (originally) due to Smullyan. We start with the riddle of the yes-no brothers and then the somewhat more complicated riddle of the da-ja brothers is studied. Finally, we study the Hardest Logic Puzzle Ever (HLPE). We present the respective riddles as sets of sentences of quotational languages, which are interpreted by sentence-structures. Using a revision-process the consistency of these sets is established. In our formal framework we observe some interesting dissimilarities between HLPE’s available solutions that were hidden due to their previous formulation in natural language. Finally, we discuss more recent solutions to HLPE which, by means of self-referential questions, reduce the number of questions that have to be asked in order to solve HLPE. Although the essence of the paper is to introduce a framework that allows us to formalize riddles about truth that do not involve self-reference, we will also shed some formal light on the self-referential solutions to HLPE.     

Knowing what we do not know about sexual orientation change efforts

Comments on the original article, "Guidelines for psychological practice with lesbian, gay, and bisexual clients," by the American Psychological Association (see record 2011-19419-001). The present authors notes that the APA has provided a very helpful document for those who do clinical work with individuals experiencing same-sex attractions. Psychologists no doubt need to be familiar with the literature described in these guidelines as a part of ethical practice. However, the present authors register concern regarding how the guidelines address sexual orientation change efforts (SOCE). They focus their critique on how the guidelines portray two issues pertaining to SOCE-effectiveness and harm-and conclude with a proposal to move the discussion forward via science. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Learning about wisdom from Lehrer

The paper discusses Lehrer??s pioneering approach to the topic of wisdom. His pithy proposal, that wisdom is preference of merit justified by an evaluation system and undefeated by error, fits well within the grand philosophical tradition of thinking about wisdom, offering a very clear and original formulation of its target. The first part of the paper puts it on a map of philosophical options concerning wisdom (anthropo-, theo- and cosmo-centric ones) and then raises questions about it: does preference have to motivate, what is the relation between factual and evaluative knowledge in the evaluation system, and how is the objectivity of merit secured? The second part briefly develops an alternative proposal inspired by Lehrer??s work. It is a two-level picture. Wisdom combines the virtues of the first-order production of decision and action (reliability and practical validity) with second-order reflective endorsement of the first-order picture. The first-order production yields phronesis-generated action-guiding desires which constitute practical wisdom in the narrow sense, and the second level the more refined and sophisticated wisdom of philosophers and their kin.     

Research participants telling the truth about their lives: the ethics of asking and not asking about abuse

Most discussions of the ethics of self-report research on abuse and interpersonal violence focus on the risks of asking participants about their experiences. An important element of the cost-benefit analysis--the costs of not asking about child abuse--has largely been ignored. Furthermore, little research has been conducted on the costs and benefits of child abuse research, leaving researchers to make decisions based on individual beliefs about such issues as the prevalence of abuse, the likelihood of disclosure, the effects of child abuse, and the ability of abuse survivors to give informed consent. The authors suggest that these beliefs tend to overemphasize survivors' vulnerability and ignore the costs of avoiding asking about abuse. In fact, these beliefs may reinforce societal avoidance of abuse and ultimately harm abuse survivors.