A little learning is a dangerous thing: an experimental demonstration of ignorance-driven inference

Studies of ignorance-driven decision making have been employed to analyse when ignorance should prove advantageous on theoretical grounds or else they have been employed to examine whether human behaviour is consistent with an ignorance-driven inference strategy (e.g., the recognition heuristic). In the current study we examine whether - under conditions where such inferences might be expected - the advantages that theoretical analyses predict are evident in human performance data. A single experiment shows that, when asked to make relative wealth judgements, participants reliably use recognition as a basis for their judgements. Their wealth judgements under these conditions are reliably more accurate when some of the target names are unknown than when participants recognize all of the names (a "less-is-more effect"). These results are consistent across a number of variations: the number of options given to participants and the nature of the wealth judgement. A basic model of recognition-based inference predicts these effects.     

A little learning is a dangerous thing: An experimental demonstration of ignorance-driven inference

Studies of ignorance-driven decision making have been employed to analyse when ignorance should prove advantageous on theoretical grounds or else they have been employed to examine whether human behaviour is consistent with an ignorance-driven inference strategy (e.g., the recognition heuristic). In the current study we examine whether—under conditions where such inferences might be expected—the advantages that theoretical analyses predict are evident in human performance data. A single experiment shows that, when asked to make relative wealth judgements, participants reliably use recognition as a basis for their judgements. Their wealth judgements under these conditions are reliably more accurate when some of the target names are unknown than when participants recognize all of the names (a “less-is-more effect”). These results are consistent across a number of variations: the number of options given to participants and the nature of the wealth judgement. A basic model of recognition-based inference predicts these effects.     

A little labeling goes a long way: Semi‐supervised learning in infancy

There is considerable evidence that labeling supports infants' object categorization. Yet in daily life, most of the category exemplars that infants encounter will remain unlabeled. Inspired by recent evidence from machine learning, we propose that infants successfully exploit this sparsely labeled input through “semi‐supervised learning.” Providing only a few labeled exemplars leads infants to initiate the process of categorization, after which they can integrate all subsequent exemplars, labeled or unlabeled, into their evolving category representations. Using a classic novelty preference task, we introduced 2‐year‐old infants (n = 96) to a novel object category, varying whether and when its exemplars were labeled. Infants were equally successful whether all exemplars were labeled (fully supervised condition) or only the first two exemplars were labeled (semi‐supervised condition), but they failed when no exemplars were labeled (unsupervised condition). Furthermore, the timing of the labeling mattered: when the labeled exemplars were provided at the end, rather than the beginning, of familiarization (reversed semi‐supervised condition), infants failed to learn the category. This provides the first evidence of semi‐supervised learning in infancy, revealing that infants excel at learning from exactly the kind of input that they typically receive in acquiring real‐world categories and their names.     

Development, Freedom, and Rising Happiness: A Global Perspective (1981–2007)

ABSTRACT— Until recently, it was widely held that happiness fluctuates around set points, so that neither individuals nor societies can lastingly increase their happiness. Even though recent research showed that some individuals move enduringly above or below their set points, this does not refute the idea that the happiness levels of entire societies remain fixed. Our article, however, challenges this idea: Data from representative national surveys carried out from 1981 to 2007 show that happiness rose in 45 of the 52 countries for which substantial time-series data were available. Regression analyses suggest that that the extent to which a society allows free choice has a major impact on happiness. Since 1981, economic development, democratization, and increasing social tolerance have increased the extent to which people perceive that they have free choice, which in turn has led to higher levels of happiness around the world, as the human development model suggests.     

The Parallel Episodic Processing (PEP) model 2.0: A single computational model of stimulus-response binding,contingency learning,power curves,and mixing costs

The current paper presents an extension of the Parallel Episodic Processing model. The model is developed for simulating behaviour in performance (i.e., speeded response time) tasks and learns to anticipate both how and when to respond based on retrieval of memories of previous trials. With one fixed parameter set, the model is shown to successfully simulate a wide range of different findings. These include: practice curves in the Stroop paradigm, contingency learning effects, learning acquisition curves, stimulus-response binding effects, mixing costs, and various findings from the attentional control domain. The results demonstrate several important points. First, the same retrieval mechanism parsimoniously explains stimulus-response binding, contingency learning, and practice effects. Second, as performance improves with practice, any effects will shrink with it. Third, a model of simple learning processes is sufficient to explain phenomena that are typically (but perhaps incorrectly) interpreted in terms of higher-order control processes. More generally, we argue that computational models with a fixed parameter set and wider breadth should be preferred over those that are restricted to a narrow set of phenomena.     

Exploring the Clinical Implications of the International CS Reference Data for Children and Adolescents (Meyer,Erdberg, & Shaffer, 2007)

As part of an ongoing study on the prediction of suicide, a replication study was carried out on the Neuropsychiatric Hospital Suicide Potential Scale (NPHSPS), a recently constructed schedule for prediction of potentiality for committed suicide among hospitalized neuropsychiatric patients at the time of release from the hospital. The population consisted of 54 patients who had committed suicide and 50 patients who had not. Overall accuracy of the scale was 81.7 percent, with 95.2 percent accuracy for prediction of the high risk group and 80.0 percent accuracy for prediction of nonsuicidal controls. By computation of posterior probability, the scale is shown to increase accuracy of prediction more than five-fold over use of the base rate (or prior probability) alone, but it is also evident the level of prediction of suicide is still too minimal to permit individual clinical application.     

The revised six-factor Sport Motivation Scale (Mallett,Kawabata, Newcombe,Otero-Forero, & Jackson, 2007): Something old,something new,and something borrowed

ObjectivesMallett, Kawabata, Newcombe, Otero-Forero, and Jackson (2007) questioned the validity of some of the items from the SMS, the construct validity of the three types of intrinsic motivation measured by the SMS, and they proposed an integrated regulation subscale to measure the most self-determined form of extrinsic motivation proposed by SDT. In this article, we focus on the following two questions: “Does the SMS need to be revised?”, and “Is the Revised 6-factor SMS a better scale?”.ConclusionOur review leads us to the following main conclusions: (a) the SMS has generally demonstrated acceptable validity and reliability in many previous studies, supporting its use; (b) the proposed revised version may also be problematic due to item selection, factor structure, and validity issues as well as problems with the integration scale.     

Filling-in models of completion: rejoinder to Kellman, Garrigan, Shipley, and Keane (2007) and Albert (2007)

There has been a growing interest in understanding the computations involved in the processes underlying visual segmentation and interpolation in conditions of occlusion. P. J. Kellman, P. Garrigan, T. F. Shipley, and B. P. Keane and M. K. Albert defended the view that identical contour interpolation mechanisms underlie modal and amodal completion. In the current rejoinder, the author provides further psychophysical evidence against this view and argues that no physiological data support the claim that modal and amodal contours are represented identically at any stage of processing. The author also shows that the illusory glass surfaces that Kellman et al. and Albert upheld as evidence against his arguments about luminance constraints in completion are explained by theoretical principles that he has previously articulated, and variants of these illusions receive no explanation within either of the models Kellman et al. and Albert propose. The author shows that the principles needed to explain these percepts embody fundamental asymmetries in the way that relative depth shapes segmentation and interpolation processes and that models of completion that lack these constraints--such as P. J. Kellman, P. Garrigan, and T. F. Shipley's and M. K. Albert's --cannot account for a host of documented completion phenomena.     

Resilience and Enhancement in Sport,Exercise, & Training (RESET): A brief self-compassion intervention with NCAA student-athletes

Athletes often believe that self-criticism is necessary to avoid complacency, but this attitude can lead to anxiety and stress. Research shows that self-compassion is an adaptive way to relate to mistakes and challenges. Although there are many benefits of self-compassion, fear that self-compassion harms performance may discourage athletes from adopting this approach. This study developed and tested an online self-compassion intervention for athletes called RESET (Resilience and Enhancement in Sport, Exercise, & Training), adapted from the Mindful Self-Compassion program. Between-group analyses (multilevel modeling; MLM) and within-group analyses (paired t-tests) were used to assess the effectiveness of the intervention on athletes’ ability to respond compassionately to failure, improve well-being, and increase perceived sport performance. Compared to the waitlist control (n = 102, 71% women), the intervention group (n = 148, 90% women) experienced greater increases in self-compassion, decreases in self-criticism and fear of self-compassion, and greater improvements in perceived performance. In general, the intervention was more effective for those who had the most room for growth. Within-group analyses supported the MLM findings while also showing that athletes who participated in the RESET program experienced reduced levels of depression, anxiety, and stress. Program evaluation measures, including participant testimonials, extend the quantitative findings and demonstrate that RESET was engaging, well-liked, and effective.     

Questioning Chase and Simon's (1973) “Perception in Chess”: The “experience recognition” hypothesis

Pattern recognition lies at the heart of the cognitive science endeavor. In this paper, we provide some criticism of this notion, using studies of chess as an example. The game of chess is, as significant evidence shows, a game of abstractions: pressures; force; open files and ranks; time; tightness of defense; old strategies rapidly adapted to new situations. These ideas do not arise on current computational models, which apply brute force by rote-memorization. In this paper we assess the computational models of CHREST and CHUMP, and argue that chess chunks must contain semantic information. This argument leads to a new and contrasting claim, as we propose that key conclusions of Chase and Simon's (1973) influential study stemmed from a non-sequitur. In the concluding section, we propose a shift in philosophy, from “pattern recognition” to a framework of “experience recognition”.     

Medicine,Money & Morals,Physicians' Conflicts of Interest(Book)

Differences in undergraduate students' perceptions of unequal status dating relationships in academia were investigated. Two hundred sixty college undergraduates from a private northeastern university evaluated three types of dating relationships: (a) professor-undergraduate student, (b) professor-graduate assistant, and (c) graduate assistant-undergraduate student. Fictional scenarios were used to assess participants' perceptions of the three types of dating relationships. Responses were analyzed both quantitatively and qualitatively. Quantitative results indicated the professor-undergraduate student dating relationship was labeled unethical whereas the qualitative results revealed a possible gender effect.     

Words, hemispheres, and processing mechanisms: A response to Marsolek and Deason (2007)

Ellis, Ansorge and Lavidor (2007) [Ellis, A.W., Ansorge, L., & Lavidor, M. (2007). Words, hemispheres, and dissociable subsystems: The effects of exposure duration, case alternation, priming and continuity of form on word recognition in the left and right visual fields. Brain and Language, 103, 292–303.] presented three experiments investigating the effects of exposure duration and format (normal vs mixed or alternating case) on the recognition of words presented in the left and right visual fields. The experiments were conducted within the framework of ‘dissociable neural subsystems theory’ developed by Marsolek and colleagues. Marsolek and Deason (2007) [Marsolek, C.J. & Deason, R.G. (2007). Hemispheric asymmetries in visual word-form processing: Progress, conflict, and evaluating theories. Brain and Language, 103, 304–307.] offer some reflections on our paper, including alternative interpretations of some of our findings. We respond to those reflections in this reply.     

Gender, jealousy, and attachment: A (more) thorough examination across measures and samples

We examined the role of attachment and gender on responses to hypothetical sexual and emotional infidelity. Unlike previous studies, both categorical and continuous attachment style and infidelity distress measures were administered to separate samples of college students and adults. Consistent with previous jealousy research, we found moderate gender differences on forced-choice measures of infidelity distress but smaller differences on continuous measures. However, across all analyses, attachment style was not a significant predictor. We discuss this failure to replicate Levy and Kelly (2010) and provide suggestions for future research.