Effect propensity

In a choice between two options, decision makers can often be roughly divided into three groups: those who strongly prefer the first option, those who strongly prefer the second option, and those whose choices are most sensitive to the specific conditions (Switchers). In any reference state, such as the experimental control, Switchers’ choices are unlikely to be exactly equally divided between the options, which potentially creates a ceiling effect among those most susceptible to influence by the particular conditions or experimental manipulations. The limited growth potential of the option favored by Switchers in the reference state can produce “effect propensity,” whereby any condition or manipulation applied to the reference state is more likely to increase the share of the other option. We test this proposition in a series of studies in the context of choices between safe and risky options and between lower-price/quality and higher-price/quality options. The results indicate that a large majority of conceptually unrelated manipulations tend to increase the choice share of risky and higher-price/quality options. This effect propensity can be reversed when the risky and higher-price/quality options are the status quo alternatives or asymmetrically dominating in the reference state. Alternative explanations for effect propensity are examined. We discuss the implications of effect propensity for the interpretation of research findings, the selection of controls, and theory tests.     

Electrifying diagrams for learning: principles for complex representational systems

Six characteristics of effective representational systems for conceptual learning in complex domains have been identified. Such representations should: (1) integrate levels of abstraction; (2) combine globally homogeneous with locally heterogeneous representation of concepts; (3) integrate alternative perspectives of the domain; (4) support malleable manipulation of expressions; (5) possess compact procedures; and (6) have uniform procedures. The characteristics were discovered by analysing and evaluating a novel diagrammatic representation that has been invented to support students' comprehension of electricity—AVOW diagrams (Amps, Volts, Ohms, Watts). A task analysis is presented that demonstrates that problem solving using a conventional algebraic approach demands more effort than AVOW diagrams. In an experiment comparing two groups of learners using the alternative approaches, the group using AVOW diagrams learned more than the group using equations and were better able to solve complex transfer problems and questions involving multiple constraints. Analysis of verbal protocols and work scratchings showed that the AVOW diagram group, in contrast to the equations group, acquired a coherently organised network of concepts, learnt effective problem solving procedures, and experienced more positive learning events. The six principles of effective representations were proposed on the basis of these findings. AVOW diagrams are Law Encoding Diagrams, a general class of representations that have been shown to support learning in other scientific domains.     

Choice is Not True or False: The Domain of Rhetorical Argumentation

Leading contemporary argumentation theories such as those of Ralph Johnson, van Eemeren and Houtlosser, and Tindale, in their attempt to address rhetoric, tend to define rhetorical argumentation with reference to (a) the rhetorical arguer’s goal (to persuade effectively), and (b) the means he employs to do so. However, a central strand in the rhetorical tradition itself, led by Aristotle, and arguably the dominant view, sees rhetorical argumentation as defined with reference to the domain of issues discussed. On that view, the domain of rhetorical argumentation is centered on choice of action in the civic sphere, and the distinctive nature of issues in this domain is considered crucial. Hence, argumentation theories such as those discussed, insofar as they do not see rhetoric as defined by its distinctive domain, apply an understanding of rhetoric that is historically inadequate. It is further suggested that theories adopting this understanding of rhetoric risk ignoring important distinctive features of argumentation about action.

Empirical,Logical and Philosophical Arguments Against Cigarette Smoking as a Pharmacologically Compelled Act

The fundamental hypothesis of the disease model of nicotine addiction states that, following a regime of chronic smoking, further smoking becomes a pharmacologically compelled rather than a chosen act. Despite it’s public and professional popularity as an explanation for why people continue to smoke in spite of a deteriorating quality of life, the validity of this hypothesis has been critically undermined by the state of evidence in four domains: inconclusive empirical evidence of withdrawal severity as a potent predictor of quit outcome; methodological problems concerning the measurement of factors which maintain smoking; logical problems with the interpretation of factors which maintain smoking, in particular, failures to discriminate reflexive and mediated actions in explanations of why people smoke; and philosophical problems with conceptualisations of human action as determined rather than willed. In light of these problems, it is argued that evidence on the nature of nicotine addiction is not well explained by the disease model, but rather, posits smoking primarily as a decision-making process influenced peripherally by the pharmacologic effects of nicotine on the brain and body.

Sticky plans: Inhibition and binding during serial-task control

Recent evidence suggests substantial response-time costs associated with lag-2 repetitions of tasks within explicitly controlled task sequences [Koch, I., Philipp, A. M., Gade, M. (2006). Chunking in task sequences modulates task inhibition. Psychological Science, 17, 346-350; Schneider, D. W. (2007). Task-set inhibition in chunked task sequences. Psychonomic Bulletin & Review, 14, 970-976], a result that has been interpreted as inhibition of no-longer relevant tasks. Experiments 1-3 confirm much larger lag-2 costs under serial-control than under externally cued conditions, but also show (a) that these costs occur only when sequences contain at least two distinct chunks and (b) that direct lag-2 repetitions are not a necessary condition for their occurrence. This pattern suggests the hypothesis that rather than task-set inhibition, the large lag-2 costs observed in complex sequences, reflect interference resulting from links between positions within a sequential plan and the individual tasks controlled by this plan. The remaining experiments successfully test this hypothesis (Experiment 4), rule out chaining accounts as a potential alternative explanation (Experiment 5), and demonstrate that interference results from information stored in long-term memory rather than working memory (Experiment 6). Implications of these results for an integration of models of serial-order control and serial memory are discussed.     

The implications of imperfect measurement for free-choice carry-over effects: Reply to M. Keith Chen’s (2008) “Rationalization and cognitive dissonance: Do choices affect or reflect preferences?”

Examinations of post-choice decision-making behavior often involve two successive choices. At time 1, participants choose between two equally attractive items. At time 2, participants choose between the unchosen item from time 1 and a new item that is roughly equal in attractiveness to the other two. The option rejected at time 1 will tend to again be rejected at time 2, a tendency often attributed to a psychological carry-over effect. Chen (2008) (Available from: http://cowles.econ.yale.edu/P/cd/d16b/d1669.pdf) discounts these psychological explanations. He argues that, given the time 1 choice, there is, in fact, a baserate probability of 66.7% that the initially unchosen item will be rejected again at time 2. However, Chen’s argument rests on the unwarranted assumption that the time 1 choice provides a perfectly reliable measure of subjects’ preference for the chosen item over the unchosen item. With more realistic estimates of the association between preference and choice, Chen’s statistical explanation cannot fully account for the carry-over effect. Alternative experimental methodologies that eliminate Chen’s statistical explanation are discussed.     

In pursuit of the proper null: Reply to

Chen argued that the proper null hypothesis for free-choice studies examining shifts in choice was 66.7%. Sagarin and Skowronki (2009) questioned the appropriateness of this value, noting that it was based on an unwarranted assumption that subjects always choose preferred options over less preferred options. In this paper, we respond to the points raised by Chen and Risen (2009), noting that: (a) violations of an additional unwarranted assumption (perfect transitivity) also move the proper null hypothesis towards 50%; (b) the validation of pretest measures would enable researchers to estimate an upper bound on the proper null; (c) the “blind” choice methodology proposed by Sagarin and Skowronski places the null unambiguously at 50%; and (d) Sagarin and Skowronski correctly call for null-hypothesis tests where needed. In the end, we again endorse the idea that this debate is best resolved empirically, but we believe the empirical avenues available are wider than those endorsed by Chen and Risen.     

Multitimescale dynamical interactions between speech rhythm and gesture

Temporal patterns in human movement, and in speech in particular, occur on multiple timescales. Regularities in such patterns have been observed between speech gestures, which are relatively quick movements of articulators (e.g., tongue fronting and lip protrusion), and also between rhythmic units (e.g., syllables and metrical feet), which occur more slowly. Previous work has shown that patterns in both domains can be usefully modeled with oscillatory dynamical systems. To investigate how rhythmic and gestural domains interact, an experiment was conducted in which speakers performed a phrase repetition task, and gestural kinematics were recorded using electromagnetic articulometry. Variance in relative timing of gestural movements was correlated with variance in rhythmic timing, indicating that gestural and rhythmic systems interact in the process of planning and producing speech. A model of rhythmic and gestural planning oscillators with multifrequency coupling is presented, which can simulate the observed covariability between rhythmic and gestural timing.     

Similar Processes Despite Divergent Behavior in Two Commonly Used Measures of Risky Decision Making

Performance on complex decision-making tasks may depend on a multitude of processes. Two such tasks, the Iowa Gambling Task (IGT) and Balloon Analog Risk Task (BART), are of particular interest because they are associated with real world risky behavior, including illegal drug use. We used cognitive models to disentangle underlying processes in both tasks. Whereas behavioral measures from the IGT and BART were uncorrelated, cognitive models revealed two reliable cross-task associations. Results suggest that the tasks similarly measure loss aversion and decision-consistency processes, but not necessarily the same learning process. Additionally, substance-using individuals (and especially stimulant users) performed worse on the IGT than healthy controls did, and this pattern could be explained by reduced decision consistency.     

任务结构相似性对工作记忆训练迁移效应的影响

个体的工作记忆能力通过训练可以提高,但是,目前对于工作记忆训练的迁移效应尚未有统一的结论。本文通过梳理相关研究,发现训练任务与评估迁移效应任务之间的结构相似性会对迁移效应产生影响。结构相似性即训练任务和未训练任务之间共享加工成分和加工程序,而这个共享加工成分和加工程序能通过发展相似的策略实现工作记忆训练的迁移。今后研究应该更加注意以往研究设计中的不足,针对不同群体的工作记忆训练效果的机制分别进行研究。