The effect of time pressure on risky choice behavior

Thirty six subjects chose individually between pairs of gambles under three time pressure conditions: High (8 seconds), Medium (16 seconds) and Low (32 seconds). The gambles in each pair were equated for expected value but differed in variance, amounts to win and lose and their respective probabilities. Information about each dimension could be obtained by the subject sequentially according to his preference.The results show that subjects are less risky under High as compared to Medium and Low time pressure, risk taking being measured by choices of gambles with lower variance or lower amounts to lose and win. Subjects tended to spend more time observing the negative dimensions (amount to lose and probability of losing), whereas under low time pressure they preffered observing their positive counterparts. Information preference was found to be related to choices.Filtration of information and acceleration of its processing appear to be the strategies of coping with time pressure.     

时间压力、个人相关性对不同类型框架下决策的影响

该文以178名大学生为被试,考察三种框架下,时间压力、个人相关性对决策及框架效应的影响。结果表明,风险选择框架中,时间压力大,被试思考点数目少,决策保守;但压力和相关性均没有对框架效应造成影响;判定框架下,相关性越高,思考点数目越多,越不易出现框架效应;决策与思考点数目基本保持一致。     

Risk preference and choice stochasticity during decisions for other people

In several contexts, such as finance and politics, people make choices that are relevant for others but irrelevant for oneself. Focusing on decision-making under risk, we compared monetary choices made for one’s own interest with choices made on behalf of an anonymous individual. Consistent with the previous literature, other-interest choices were characterized by an increased gambling propensity. We also investigated choice stochasticity, which captures how much decisions vary in similar conditions. An aspect related to choice stochasticity is how much decisions are tuned to the option values, and we found that this was higher during self-interest than during other-interest choices. This effect was observed only in individuals who reported a motivation to distribute rewards unequally, suggesting that it may (at least partially) depend on a motivation to make accurate decisions for others. Our results indicate that, during decision-making under risk, choices for other people are characterized by a decreased tuning to the values of the options, in addition to enhanced risk seeking.     

Effects of ego-depletion on choice behaviour in a multi-attribute decision task

When a choice has to be made between two options and decision-relevant information about the options is completely available, the Take-The-Best (TTB) heuristic only considers the most important information that discriminates between the options and bases its choice on it. Choices in line with TTB thus allow a decision maker to save time and effort, and they may become more likely therefore under conditions of limited self-control strength (ego-depletion). Ego-depletion was manipulated prior to making a series of choices in a multi-attribute decision task. Choices could have been in line with either TTB or more effortful compensatory decision strategies. As predicted, compared with non-depleted participants, ego-depleted participants were more likely to make TTB-consistent choices.     

An eye‐tracking study on information processing in risky decisions: Evidence for compensatory strategies based on automatic processes

Many everyday decisions have to be made under risk and can be interpreted as choices between gambles with different outcomes that are realized with specific probabilities. The underlying cognitive processes were investigated by testing six sets of hypotheses concerning choices, decision times, and information search derived from cumulative prospect theory, decision field theory, priority heuristic and parallel constraint satisfaction models. Our participants completed 40 decision tasks of two gambles with two non‐negative outcomes each. Information search was recorded using eye‐tracking technology. Results for choices, decision time, the amount of information searched for, fixation durations, the direction of the information search, and the distribution of fixations conflict with the prediction of the non‐compensatory priority heuristic and indicate that individuals use compensatory strategies. Choice proportions are well in line with the predictions of cumulative prospect theory. Process measures indicate that individuals thereby do not rely on deliberate calculations of weighted sums. Information integration processes seem to be better explained by models that partially rely on automatic processes such as decision field theory or parallel constraint satisfaction models. Copyright © 2010 John Wiley & Sons, Ltd.     

Similarity and Alignment in Choice

Research in decision making often assumes that corresponding dimensions or features of choices are compared. At the same time, recent models of similarity comparison stress the importance of structural alignment and associated inference processes. The present studies integrate these perspectives by examining feature listings and choices for pairs of video games varying in their comparability. In the first study, one group of participants simply compared pairs of games and listed commonalities and differences. Another group made selections between games and provided justifications for their decisions. We observed close correspondences between justifications and feature listings across wide variation in comparability. In addition, the justifications systematically favored comparable over noncomparable properties. Features also seemed to be created or inferred to promote alignability. The second study manipulated the comparability of individual properties. Here, justifications were more likely to include a property when it was comparable than when it was noncomparable. These observations suggest a constructive alignment process common to similarity and choice.     

Mixing virtue and vice: combining the immediacy effect and the diversification heuristic

Many of the most significant choices that people make are between vices, which exchange small immediate rewards for large delayed costs, and virtues, which exchange small immediate costs for large delayed rewards. We investigate the consequences of making a series of such choices either simultaneously or sequentially. We made two predictions. First, because many alternatives chosen under simultaneous choice will only be experienced following a delay, and because hyperbolic time discounting predicts that people will prefer delayed virtues but immediate vices, we predicted that people would choose more virtues in simultaneous than sequential choice. Second, due to the tendency to diversify portfolios of choices, we predicted a greater mix of virtues and vices in simultaneous than sequential choice. These predictions were confirmed in two experiments involving real choices; one between ‘highbrow’ and ‘lowbrow’ movies, and the other between ‘instant‐win’ and ‘prize‐draw’ lottery tickets. We conclude by posing the question of whether simultaneous or sequential choice results in decisions that more closely approximate what people ‘really’ want. Copyright © 1999 John Wiley & Sons, Ltd.     

Collaborative false recall in the DRM procedure: Effects of group size and group pressure

Basden, Basden, Thomas, and Souphasith (1998) demonstrated that false recall in collaborative trios is enhanced when group members feel under pressure to output items. In the present study, individuals, pairs, trios, and quartets were presented with lists of words drawn from the Deese-Roediger-McDermott paradigm. Memory was tested under high or low group pressure conditions. It was found that false recall increased in proportion to group size regardless of group pressure, but that groups experiencing the most pressure to output items made a greater number of errors. Furthermore, on a surprise later individual recall test, participants who experienced the most pressure during collaboration retained an equivalent level of critical lures. Collectively these findings demonstrate that group pressure can increase collaborative false recall, and that these false memories can be retained beyond group testing.     

The development of social value orientation across different contexts

This study aimed to explore Chinese children's social value orientation across different ages and contexts. Revised decomposed games were used to measure the social value orientation of 9‐, 11‐, and 14‐year‐old children and college students as an adult group. About half of them were assigned to the hypothetical context of “equal payment group,” providing equal compensation for participation in the study, and the others to the “real payment group,” who got payment according to their own choices in the games. Results showed that 9‐ and 11‐year‐old children's choices differed between the two contexts: They made more prosocial choices in the hypothetical context, and more competitive choices in the “real payment” context. The 14‐year‐olds’ and adults’ choices were not significantly different in the two contexts. These results may imply that by 14 years of age, children have stable social value orientation, and their behavior reflects this value.     

The effects of discussion on group and individual choices among bets

The effects of discussion on subsequent group and individual choices are studied in a situation where subjects choose between a sure gain of varying amount and five probability levels associated with larger gains of expected value equal to that of the sure gain. At the end of the experiment, a single bet, chosen at random, is played for money. Before discussion, subjects have to guess the percentage of similar, more risky and more cautious choices made by their peers for each of the six bets. As predicted by a majority-rule decision-making model significant risky shifts were observed for relatively low values of sure gain. For higher values, however, groups tended to be more cautious than individuals. The final private choices of individuals were significantly more risky than their initial decisions. Most individuals apparently thought they were at least as risky as most others. This finding was due, however, primarily to the responses of subjects who chose the highest risk-level (the ceiling effect) and, secondly, to the consistent tendency of most individuals to guess that others make the same choices as they themselves. It is concluded that majority influence seems a satisfactory explanation of group risky shifts observed in the present study, but it cannot account for modifications of group and individual choices in all risk-taking situations.     

Demonstrator skill modulates observational aversive learning

Learning to avoid danger by observing others can be relatively safe, because it does not incur the potential costs of individual trial and error. However, information gained through social observation might be less reliable than information gained through individual experiences, underscoring the need to apply observational learning critically. In order for observational learning to be adaptive it should be modulated by the skill of the observed person, the demonstrator. To address this issue, we used a probabilistic two-choice task where participants learned to minimize the number of electric shocks through individual learning and by observing a demonstrator performing the same task. By manipulating the demonstrator’s skill we varied how useful the observable information was; the demonstrator either learned the task quickly or did not learn it at all (random choices). To investigate the modulatory effect in detail, the task was performed under three conditions of available observable information; no observable information, observation of choices only, and observation of both the choices and their consequences. As predicted, our results showed that observable information can improve performance compared to individual learning, both when the demonstrator is skilled and unskilled; observation of consequences improved performance for both groups while observation of choices only improved performance for the group observing the skilled demonstrator. Reinforcement learning modeling showed that demonstrator skill modulated observational learning from the demonstrator’s choices, but not their consequences, by increasing the degree of imitation over time for the group that observed a fast learner. Our results show that humans can adaptively modulate observational learning in response to the usefulness of observable information.     

Perceived control in rhesus monkeys (Macaca mulatta): enhanced video-task performance

This investigation was designed to determine whether perceived control effects found in humans extend to rhesus monkeys (Macaca mulatta) tested in a video-task format, using a computer-generated menu program, SELECT. Choosing one of the options in SELECT resulted in presentation of 5 trials of a corresponding task and subsequent return to the menu. In Experiments 1-3, the animals exhibited stable, meaningful response patterns in this task (i.e., they made choices). In Experiment 4, performance on tasks that were selected by the animals significantly exceeded performance on identical tasks when assigned by the experimenter under comparable conditions (e.g., time of day, order, variety). The reliable and significant advantage for performance on selected tasks, typically found in humans, suggests that rhesus monkeys were able to perceive the availability of choices.     

Incongruence of Sentence Completions under Time Pressure and Freedom

A direct relationship is hypothesized between amount of ego-alien content elicited by SC tests and amount of time pressure imposed. This prediction, tested with female college Ss, was supported by: (a) the results of two independent groups, one taking the test under time pressure and the other under freedom; (b) the results of a single group which was given the test under pressure and later under freedom, and those of a control group for whom the test was repeated under identical pressure conditions. Measures of incongruence within a given personality were obtained by assessing the dissimilarity of completions elicited under pressure and freedom. Anxious Ss showed a greater degree of incongruence than non-anxious Ss.     

The Effects of Visual Orientation on the Maze Learning Ability of the White Rat

Since most studies which employ sociometric measures have either ignored the sensitivity of these measures to changes in group structure or have failed to indicate the relative sensitivity of the different types of measures across time and at different age levels, a way to categorize sociometric responses according to the usefulness in reflecting changes both across time and at various age levels was hypothesized. A total of 607 students in grades four through eight responded to a sociometric questionnaire. These responses were analyzed by obtaining test-retest correlations for choices given, choices received, and reciprocal choices. The results indicate that reciprocal choices are less affected by age and time changes than all other ways of interpreting sociometric data.     

适应性时间管理：死亡意识对时间知觉和跨期决策的影响

死亡意识是个体对自身死亡必然性的认识; 基于进化适应性的考量, 作者认为具有前瞻性的死亡意识作为人类特有的认知能力和个体生命史的终极坐标, 不仅可能引起恐惧感和防御反应, 更重要的是可以帮助人们做出适应性的时间管理。据此推论, 死亡意识的启动会加强人们对时间有限性的关注, 体验出更强的时间流逝感, 影响人们对时间的评估, 以及人们对不同时间点的成本与收益进行权衡而做出的跨期决策。本研究采用死亡凸显范式启动死亡意识, 通过两个实验探讨了死亡意识、时间知觉和跨期决策三者之间的关系。结果发现, 死亡意识启动使被试低估时间距离, 并表现出较低的跨期决策延迟折扣率, 从而在较小的即时获益与更大的延迟的获益之间更为偏好未来导向的选项。进一步的分析显示, 时间知觉在死亡意识和跨期决策延迟折扣率之间起到部分中介变量的作用。以上的研究结果初步揭示了死亡意识在时间管理上的适应性价值。     

Social learning under the labeling effect: Exploring travellers’ behavior in social dilemmas

This paper presents results of a laboratory experiment, in which subjects made choices between public and private transportation when managing Personal Carbon Allowances (PCAs). The objectives of this study were twofold. Firstly, it was aimed at investigating the labeling effect under the social dilemma context. Secondly, it showed insights into the decision-making process when feedback about others’ choices was provided. A combination of the labeling effect and feedback helped individuals change their commuting pattern and increase the number of trips by public transportation under the PCAs regime. Feedback on others’ choices resulted in social learning and incentivized choice of public transportation more frequently in social dilemma situations.     

Rhyme recognition and phonemic perception in young children

A forced-choice rhyme recognition test was used to assess the ability of 4-,5-, and 6-year-old children to recognize rhymes. The number and position of phonemes shared by the rhyming and nonrhyming response choices were systematically varied. Although there were age differences, the performance levels were quite high for all age groups, including the 4-year-olds. For all age groups, formal similarity of the stimulus word and nonrhyming choice proved to be a major factor determining the difficulty of rhyming items. The results were discussed in terms of potential implications for improving reading readiness.This paper is based on an M.A. thesis conducted by the first author under the direction of the second author. Funds for the purchase of computer time were made available by the Graduate College, University of Iowa.     

Exposition Effects on Decision Making: Choice and Confidence in Choice

Many of us believe that, after writing about a subject, we understand it more deeply. Studies in education indicate that writing does indeed enhance comprehension. Three experiments examined whether similar “exposition effects” exist for decision making. In these experiments, subjects were confronted with standard framing problems. Positive exposition effects would require that the influence of alternative frames on subjects' choices be diminished by exposition demands. Control subjects made choices under customary, non-exposition instructions. Others chose after writing rationales for their selections (exposition), after explicitly planning to write such rationales, or merely in anticipation of writing the rationales. Exposition reduced framing effects in each of the experiments. The magnitudes of the effects were greatest for subjects who wrote before choosing. Also, exposition markedly increased subjects' confidence that their choices were appropriate. Theoretical and practical implications are discussed.     

ASSESSING CHOICE MAKING AMONG CHILDREN WITH MULTIPLE DISABILITIES

Some learners with multiple disabilities display idiosyncratic gestures that are interpreted as a means of making choices. In the present study, we assessed the validity of idiosyncratic choice-making behaviors of 3 children with multiple disabilities. Opportunities for each child to choose between food and drink were provided under two conditions. In one condition, the children were given the food or drink item corresponding to their prior choice. In the other condition, the teacher delivered the item opposite to that chosen. It was reasoned that valid choice-making behaviors would be reflected in a greater tendency to accept the chosen item and refuse the unchosen item. Direct observations revealed all children consistently indicated choices during both conditions. Choices of both the food and drink items were made by all 3 children. A reversal design demonstrated that acts of refusal were more frequent when choices were followed by delivery of the item opposite to that chosen. Similar assessment procedures may be effective in determining the function of idiosyncratic gestures exhibited by persons with multiple disabilities. For children lacking such skills, intervention to teach valid choice-making behaviors may be needed to complement assessment procedures.