Individual differences and weight bias: Do people with an anti-fat bias have a pro-thin bias?

While levels of weight bias vary among individuals, it is not clear why one person possesses stronger anti-fat attitudes than another person. This investigation examined whether individual differences commonly associated with greater anti-fat bias are also associated with a greater preference for thinness among people of varying levels of weight. Young adults (62% women; 84% Caucasian) recruited from psychology classes (N = 308) rated four male and female figures with approximate BMIs of 18.5, 25, 30, and 40, on measures of dislike and personality characteristics and completed measures assessing weight controllability, attitudes toward the obese, and perceptual reliance. Greater negative attitudes, weight controllability beliefs, and perceptual reliance were positively associated with greater dislike and negative personality attributes among obese/severely obese figures, but inversely related among low normal weight figures. Individuals who judge others based on physical features or who view obesity as controllable evidence greater weight bias and a stronger preference for thin body types.     

Interpretation bias and social anxiety: does interpretation bias mediate the relationship between trait social anxiety and state anxiety responses?

Two studies aimed to examine whether high socially anxious individuals are more likely to negatively interpret ambiguous social scenarios and facial expressions compared to low socially anxious individuals. We also examined whether interpretation bias serves as a mediator of the relationship between trait social anxiety and state anxiety responses, in particular current state anxiety, bodily sensations, and perceived probability and cost of negative evaluation pertaining to a speech task. Study 1 used ambiguous social scenarios and Study 2 used ambiguous facial expressions as stimuli to objectively assess interpretation bias. Undergraduate students with high and low social anxiety completed measures of state anxiety responses at three time points: baseline, after the interpretation bias task, and after the preparation for an impromptu speech. Results showed that high socially anxious individuals were more likely to endorse threat interpretations for ambiguous social scenarios and to interpret ambiguous faces as negative than low socially anxious individuals. Furthermore, negative interpretations mediated the relationship between trait social anxiety and perceived probability of negative evaluation pertaining to the speech task in Study 1 but not Study 2. The present studies provide new insight into the role of interpretation bias in social anxiety.     

Structuring decision problems and the ‘bias heuristic’

This paper examines our understanding of the decomposition of immediate acts when structuring decision problems. Seven different types of uncertainties are identified, and four of these are shown to be taken explicitly into account in models within the province of decision theory, described in terms of four interlocking systems interfaced with semantic memory (a core act-event system, and systems buffering utilities, probabilities and events, respectively). Requisite decision modeling is shown to require that the remaining three types of uncertainty (procedural uncertainty; how the decision maker will feel about subsequent acts; agency for changing subsequent states of the world) are also resolved. Methods for ‘fixing’ structure are discussed in terms of aiming at a common understanding about the ‘small world’ in which a decision problem is located. Difficulties in resolving uncertainties in doing this are described. An alternative approach, common in studies invoking ‘behavioural decision theory’ is contrasted: imposing structure, assuming common understanding. The latter approach is shown to involve (i) the ‘naturalisation’ of the small world in which the decision problem is located, and (ii) the utilisation of normative models as ‘ideal types’, leading to the use of the ‘bias’ argument in discussing subjects' performance in decision tasks. Using this argument reflexively, the operation of the ‘bias heuristic’ is identified in a survey of published papers referencing this approach to the study of decision making. Effects identified are: availability of tasks, subjects and explanations; representativeness of findings; and anchoring and adjustment of explanations. Implications for practice are discussed throughout the paper.     

What kind of bias is hindsight bias?

When people are asked to recollect a former response after having received feedback information, their recollection tends to approach the feedback answer. This phenomenon is referred to as hindsight bias. Recently, Erdfelder and Buchner proposed a multinomial model designed to independently measure the contributions of reconstruction and recollection processes. On its basis, they only found firm evidence for the contribution of reconstruction biases to hindsight effects. In the present study, we tried to experimentally enhance the probability of recollection biases by (a) reducing the depth of processing of the original estimate, (b) minimizing the distinctness of the original estimate and feedback, and (c) combining both treatments. The empirical data were analyzed using a variant of the Erdfelder and Buchner model which allows for the experimental manipulation of the feedback answer. This model is shown to adequately describe the data of our experiment. Moreover, although both treatments were effective in that the first one reduced correct recollections in general and the second one diminished differences between original estimates and recalled estimates, the parameter estimates indicate that the probability of recollecting the original estimate is not hampered by feedback information, even under conditions which are thought to enhance memory impairments. Received: 10 December 1995 / Accepted: 29 October 1997     

Hindsight bias: An interaction of automatic and motivational factors?

If subjects are asked to recollect a former response after having been informed about the correct response, their recollection tends to approach the correct response. This effect has been termedhindsight bias. We studied hindsight bias in an experiment requiring numerical responses to almanac-type questions for physical quantities. We varied (1) the time at which the correct information was provided, (2) the encoding of the original responses by asking/not asking subjects to give a reason for the respective response, and (3) the motivation to recall correctly. We found that hindsight is less biased if reasons are given and if the correct information is provided at an earlier time. Motivation had only interactive effects: (1) With high motivation to recall correctly, the time the correct information was provided had no influence. (2) With reasons given, the variation of motivation showed no effect. These results rule out purely motivational and purely automatic explanations.     

Are creativity and schizotypy products of a right hemisphere bias?

Prior research has shown associations between higher creativity (e.g., semantic association, verbal fluency), higher schizotypy (e.g., magical ideation), and relatively stronger right hemisphere laterality measures--when each of the three pairings has been studied individually. Our prior study related creativity and schizotypy to signal detection theory response criterion aspects of laterality. The present study attempted to integrate findings regarding these three constructs and to replicate the signal detection theory laterality results by providing measures of all three constructs in a within subjects design. Participants were 60 undergraduates who completed a test battery including two measures of creativity, three measures of schizotypy, a lateralized lexical decision task, and a dichotic listening task. Results are consistent with individual differences in creativity and schizotypy being partly related to a response criterion favoring right hemisphere, possibly nonconscious, processing. Dichotic listening results revealed a strong association of better right hemisphere (left ear) localization ability and creativity.     

Superstitious responding and frequency matching in the positive bias and gambler’s fallacy effects

Three studies showed that success in predicting outcomes of a random binary series was associated with the positive bias effect, whereas failure was associated with the gambler’s fallacy effect. Moreover, success increased confidence and failure decreased it. Although explicit instructions that the source generated random output increased the likelihood of predicting an alternation in the series, these instructions had no effect on the relationships between success and the positive bias effect, and failure and the gambler’s fallacy effect. Importantly, intuitions about the randomness or nonrandomness of the source, assessed immediately prior to each trial, did not influence this interaction. These results suggest that people used a win-stay strategy, but that sensitivity to run length counteracted the corresponding lose-shift tendency. The data support a memory-based explanation of the gambler’s fallacy effect, consistent with the account from local representativeness, but the positive bias effect may be an instance of human superstitious responding.     

Black-white bias in ‘cultural’ and ‘noncultural’ test items

The original data of McGurk's classic study of black-white differences on cultural and noncultural tests is re-analyzed at the item level to investigate the role of possible item biases that would cause the noncultural items to be relatively more difficult than the cultural items for blacks than for whites. The evidence indicates that McGurk's results cannot be explained in terms of item biases, but appear to be the result of the noncultural items requiring more sheer reasoning ability than the cultural items, which depend more on acquired information.     

Traditional prejudice and justice judgments: Does bias suppression moderate the relationship?

This research investigated how the relationship between prejudice and intergroup inequalities with justice judgments is modulated by individual differences in self-regulation of bias through suppression. The first study conducted among 170 White British adolescents revealed that the link between racism and intergroup inequality in justice judgments was moderated by bias suppression. Prejudice, bias suppression, and blatant as well as subtle justice judgments were assessed in a second study carried out with 103 Canadian White adolescents. Bias suppression moderated the link between racist beliefs toward Aboriginals and intergroup inequality in punitive rulings. Racism translated into intergroup inequality in the potential for rehabilitation, irrespective of the level of bias suppression. The role of bias suppression is discussed.     

Sweep-induced acceleration in loudness change and the “bias for rising intensities”

A pure tone changing continuously in intensity shows sweep-induced fading (SIF) of loudness as intensity sweeps down and may show a lesser degree of sweep-induced enhancement (SIE) as intensity sweeps up (Canévet & Scharf, 1990); the former effect has been calleddecruitment, the latterupcruitment. An opposite effect—upsweeps being judged to show more loudness change than downsweeps—has been reported by Neuhoff (1998). These disparate results might stem from several procedural differences. We found that differences in the sweep’s duration and intensity level did not account for the disparity, nor did the presence of a steady tone preceding the sweep. In a second experiment, direct judgments of sweep size, such as those Neuhoff’s (1998) listeners made, were affected not only by sweep size itself, but also by the intensity at the end of the sweep. The latter effect was especially marked for upsweeps. Neuhoff’s (1998) proposed “bias for rising intensities” was found only with a method for judging sweep size that is more sensitive to end level than to sweep size.     

Motivation to inflate performance ratings: Perceptual bias or response bias?

In a laboratory experiment support was found for the idea that inflated performance evaluations may be due to a self-serving bias — the tendency for raters to highly evaluate subordinates' performance so that they may themselves appear to be successful. Two hundred sixteen students evaluating another's work gave higher ratings of performance quantity and quality to employees they counseled about their work than to others with whom they had either only social contact or no contact at all. This effect remained even when raters were not being evaluated by an authority figure, suggesting that the inflated ratings were the result of an interest in enhancing one's own self-image (a perceptual bias) rather than cultivating the favorable impression of another (a response bias). The conceptual and practical implications of these findings are discussed.The author acknowledges the helpful comments of Robert Heneman on an earlier draft of this article. A preliminary report of this experiment was presented at the meeting of the Academy of Management, San Diego, August 1985. This work was supported, in part, by grant INT-8304375 from the National Science Foundation.     

Whom to help? Immediacy bias in judgments and decisions about humanitarian aid

People exhibit an immediacy bias when making judgments and decisions about humanitarian aid, perceiving as more deserving and donating disproportionately to humanitarian crises that happen to arouse immediate emotion. The immediacy bias produced different serial position effects, contingent on decision timing (Experiment 1). When making allocation decisions directly after viewing to four emotionally evocative films about four different humanitarian crises, participants donated disproportionately more to the final, immediate crisis, in contrast, when making donation decisions sequentially, after viewing each of the four crises, participants donated disproportionately to the immediate crisis. The immediacy bias was associated with “scope neglect,” causing people to take action against relatively less deadly crises (Experiments 2 and 3). The immediacy bias emerged even when participants were warned about emotional manipulation (Experiment 3). The immediacy bias diminished over time, as immediate emotions presumably subsided (Experiment 2). Implications for charitable giving, serial position effects, and the influence of emotion on choice are discussed.     

Which route to recovery? Controlled retrieval and accessibility bias in retroactive interference

New learning often interferes with the production of older, previously learned responses. However, the original responses usually appear to spontaneously recover and regain their dominance after a delay. This article takes a new approach to questions of interference and recovery by examining performance on immediate and delayed tests using direct or indirect instructions. Direct instructions asked participants to deliberately retrieve the original responses, and indirect instructions allowed them to respond on a more automatic basis, using whatever response came to mind first. Results suggest that interference and recovery may have their largest effects via relatively automatic influences on memory, such as the accessibility of new versus original information. This finding adds a new perspective to classic theories of interference and recovery, and may also inform current understanding of performance in populations (e.g., older adults) that often rely predominantly on automatic memory processing.     

Same—differentjudgments of multiletter strings: Insensitivity to positional bias and spacing

Several recent studies of multiletter matching have included pairs of strings that have-the-same letters in different positions (rearranged pairs). The task can be defined such that these rearranged pairs are correctly classified asdifferent (i.e., subjects respond “same” only if the strings have the same letters in the same positions—the order task) or assame (i.e., subjects respond “same” if the strings have the same letters regardless of their positions—the item task). The order task produces left-to-right serial-position effects, whereas the item task produces U-shaped serial position effects. Because these differences suggest that subjects may be able to exert strategic control over the comparison process, two sets of experiments were designed to test whether or not subjects can change the relative weightings devoted to the respective serial positions. In Experiments 1 and 2, the probability that a mismatch occurred in the different positions was manipulated. In Experiments 3 and 4, the physical spacing between letters, as well as whether or not the spaces were filled with neutral noise characters, was varied. None of the manipulations had much influence on the serial-position effects. Thus, the distinct serial-position effects for the order and item tasks apparently are mandatory and not due-to-any voluntary-comparison strategy.     

Science, ethnicity, and bias: where have we gone wrong?

The quality, quantity, and funding of ethnic minority research have been inadequate. One factor that has contributed to this inadequacy is the practice of scientific psychology. Although principles of psychological science involve internal and external validity, in practice psychology emphasizes internal validity in research studies. Because many psychological principles and measures have not been cross-validated with different populations, those conducting ethnic minority research often have a more difficult time demonstrating rigorous internal validity. Thus, psychology's overemphasis of internal as opposed to external validity has differentially hindered the development of ethnic minority research. To develop stronger research knowledge on ethnic minority groups, it is important that (a) all research studies address external validity issues and explicitly specify the populations to which the findings are applicable; (b) different research approaches, including the use of qualitative and ethnographic methods, be appreciated; and (c) the psychological meaning of ethnicity or race be examined in ethnic comparisons.     

Tunnel vision or general interference? Cognitive load and attentional bias are both important

Accuracy of identification of single letters presented in the near periphery (2.2 degrees, 3.3 degrees, or 4.4 degrees) was adversely affected when subjects were given a simultaneous foveal visual task as part of the same display. The level of processing required by the foveal task as well as the attentional allocation instructions were both found to be important. Tunnel vision as opposed to general interference can be induced by a combination of high foveal cognitive load, a focused attention strategy, and speed stress.     

Measuring direct and indirect aggression: behavior of is there a response bias?

Critics of self-report methods suggest that participants are likely to underreport their own negative behaviors given concerns about social desirability. The current study examined the problem of self-report bias by comparing individuals' estimates of their own and others' aggressive behavior. Undergraduate students (95 women, 50 men) completed the Richardson Conflict Response Questionnaire with regard to either their own behavior or that of another person of the same sex. As expected, participants reported significantly less aggression for themselves than for others. However, self and other ratings showed the same pattern of sex differences. These results suggest that, although individuals may underreport their own aggressive behaviors, this tendency may not affect relationships among variables.     

Triangles in ROC space: History and theory of “nonparametric” measures of sensitivity and response bias

Can accuracy and response bias in two-stimulus, two-response recognition or detection experiments be measured nonparametrically? Pollack and Norman (1964) answered this question affirmatively for sensitivity, Hodos (1970) for bias: Both proposed measures based on triangular areas in receiver-operating characteristic space. Their papers, and especially a paper by Grier (1971) that provided computing formulas for the measures, continue to be heavily cited in a wide range of content areas. In our sample of articles, most authors described triangle-based measures as making fewer assumptions than measures associated with detection theory. However, we show that statistics based on products or ratios of right triangle areas, including a recently proposed bias index and a not-yetproposed but apparently plausible sensitivity index, are consistent with a decision process based on logistic distributions. Even the Pollack and Norman measure, which is based on non-right triangles, is approximately logistic for low values of sensitivity. Simple geometric models for sensitivity and bias are not nonparametric, even if their implications are not acknowledged in the defining publications.