Human judgments of positive and negative causal chains.

Three experiments investigated the way participants construct causal chains from experience with the individual links that make up those chains. Participants were presented with contingency information about the relationship between events A and B, as well as events B and C, using trial-by-trial presentations. The A-B and B-C contingencies could be positive, negative, or zero. Although participants had never experienced A and C together, A-C ratings were a multiplicative function of the A-B and B-C contingencies. These findings can be generated by an auto-associator using the delta rule. This explanation is also useful for understanding sensory preconditioning and second-order conditioning. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Flexible use of recent information in causal and predictive judgments.

Associative and statistical theories of causal and predictive learning make opposite predictions for situations in which the most recent information contradicts the information provided by older trials (e.g., acquisition followed by extinction). Associative theories predict that people will rely on the most recent information to best adapt their behavior to the changing environment. Statistical theories predict that people will integrate what they have learned in the two phases. The results of this study showed one or the other effect as a function of response mode (trial by trial vs. global), type of question (contiguity, causality, or predictiveness), and postacquisition instructions. That is, participants are able to give either an integrative judgment, or a judgment that relies on recent information as a function of test demands. The authors concluded that any model must allow for flexible use of information once it has been acquired. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Retrospective revaluation of causal judgments under positive and negative contingencies.

Retrospective revaluation of causal judgments was investigated in a 2-stage procedure. In the 1st stage, compounds of 2 cues were associated with the outcome, whereas in the 2nd stage, a cue from each compound was trained by itself. Associating this cue with the outcome in the 2nd stage had no detectable effect on the causal rating of the other cue from the compound, whereas presenting it without the outcome enhanced the causal rating of the other cue. The retrospective revaluation of the causal rating of these productive cues and also of preventative cues depended on consistent pairing of the cues during compound training, suggesting a role for within-compound associations. These results favor associative accounts of retrospective revaluation that use separate excitatory and inhibitory learning processes rather than a general error-correcting learning algorithm. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Schedules of reinforcement as determinants of human causality judgments and response rates.

Experiments examined the effect of relationships between a response and an outcome on human judgments of causal effectiveness. In Experiment 1, the time between outcomes obtained on a variable ratio (VR) schedule became the intervals for a yoked variable interval (VI) schedule. Response rates were higher on the VR than on the VI schedule. In Experiment 2, the number of responses required per outcome on a VR schedule were matched to that on a master VI 20-s schedule. Both ratings of causal effectiveness and response rates were higher in the VR schedule. In Experiment 3, tandem VI fixed-ratio (FR) schedules produced higher rates and judgments than equivalent conjunctive VI FR schedule. In Experiment 4, a VI schedule with a reinforcement requirement for a short interresponse time (IRT) produced higher rates and judgments than a simple VI schedule. These results corroborate the view that schedules are a determinant of both response rates and causal judgments. Few current theories of causal judgment predict this pattern of results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Rating causal relations: Role of probability in judgments of response-outcome contingency.

Investigated the possible role of the conditional probabilities of an outcome given a response P(O/R) and of an outcome given the absence of a response P(O/NoR) in mediating college students' judgments of response–outcome contingency. A total of 150 Ss in 3 experiments were asked to describe the effect that telegraph key tapping had on the brief illumination of a lamp. Ss' ratings along a prevent–cause scale closely approximated the scheduled contingencies between response (R?=?key tapping) and outcome (O?=?lamp illumination), as measured by the delta coefficient δP?=?P(O/R)?–?P(O/NoR) (Exps 1 and 3). Ss also sensitively rated the conditional probabilities of an outcome when they tapped the key and when they refrained from doing so (Exps 2 and 3). Nevertheless, the evidence failed to support the hypothesis that causal ratings were mediated by subjective judgments of P(O/R) and P(O/NoR) because the errors made in judging the conditional probabilities were not consistent with the errors made judging δP. The authors suggest that an associative explanation derived from a model devised by R. A. Rescorla and A. R. Wagner (1972) might account for these and other results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The causality of causal attributions in depression: A cross-lagged panel correlational analysis.

The attributional reformulation of the learned helplessness model of depression proposes that causal attributions about negative outcomes play a causal role in reactive depression. This research tested this hypothesis by studying the causal role of attributions in depression in 180 college students. On 2 occasions separated by 1 mo, Ss were administered a battery of tests that included an attributional style questionnaire and the Beck Depression Inventory. The attributional dimensions of internality, stability, and globality were correlated with depression; when the possible causal role of attributions was tested through the use of cross-lagged panel correlational analysis, the hypothesis that stability and globality attributions for bad outcomes might be causes of depression was supported. There was no support, however, for the hypothesis that internal attributions for bad outcomes are a cause of depression. Evidence was also found that unstable attributions for good outcomes may function as a cause of depression. (27 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Combined effect of context change and retention interval on interference in causality judgments.

Four experiments studied the effects of context change and retention interval on retroactive interference in human causal learning. Experiment 1 found evidence of retroactive interference. Experiment 2 found that either a 48-hr retention interval or a change in the context after the interference treatment decreased retroactive interference. An interaction between context change and retention interval effects was also found, eclipsing the context change effect after the 48-hr retention interval. Experiments 3 and 4 found additivity between context change and retention interval effects when participants were reminded of the difference between physical contexts before the test, independently of whether the context change involved a return to the original acquisition context. These results add to the evidence suggesting that spontaneous forgetting is caused by a change in either the physical or the temporal contexts when information is acquired. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Na?ve theories of causal force and compression of elapsed time judgments.

Recent research has shown that when people perceive a causal relation between 2 events, they “compress” the intervening elapsed time. The present work shows that a na?ve mechanical–physical conception of causality, in which causal forces are believed to dissipate over time, underlies the estimates of shorter elapsed time. Being primed with alternative, nondissipative causal mechanisms and having the cognitive capacity to consider such mechanisms moderates the compression effect. The studies rule out similarity, mnemonic association, and anchoring as alternative accounts for the effect. Taken together, the findings support the hypothesis that causal cognition plays a major role in judgments of elapsed time. The implications of the compression effect on the timing of future actions, persistence, and causal learning are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relative use of necessity and sufficiency information in causal judgments about natural categories.

Participants in 4 studies placed less emphasis on necessity information (instances when the event occurred but the target factor was absent) than sufficiency information (instances when the target factor was present but the event did not occur) when the target factor corresponded to a natural kind category (e.g., race or species) in comparison with an artificial category (e.g., preferences or facial features) or an artifactual category (e.g., product type). Results were not due to differences in familiarity, prior causal beliefs, or ease of imagining the class of instances, but instead derived from less willingness to search for alternative explanations when the target explanation was based on a natural kind category in comparison with artificial or artifactual categories. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Making causal judgments from the proportion of confirming instances: The pCI rule.

It is proposed that causal judgments about contingency information are derived from the proportion of confirmatory instances (pCI) that are evaluated as confirmatory for the causal candidate. In 6 experiments, pCI values were manipulated independently of objective contingencies assessed by the ΔP rule. Significant effects of the pCI manipulations were found in all cases, but causal judgments did not vary significantly with objective contingencies when pCI was held constant. The experiments used a variety of stimulus presentation procedures and different dependent measures. The power PC theory, a weighted version of the ΔP rule, the Rescorla-Wagner associative learning model (R. A. Rescorla & A. R. Wagner, 1972), and the ΔD rule, which is the frequency-based version of the pCI rule, were unable to account for the significant effects of the pCI manipulations. These results are consistent with a general explanatory approach to causal judgment involving the evaluation of evidence and updating of beliefs with regard to causal hypotheses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Range as a factor determining the information of loudness judgments: Overcoming small sample bias.

Experiments on the absolute identification of pure tones were conducted at a single frequency with 3 Ss (aged 18, 25, and 52 yrs) to explore several effects. The change in transmitted information as the stimulus range was varied was measured as well as the change in transmitted information as the number of categories within a fixed range was increased. In the former case, information increased with increasing range. In the latter case, information increased with increasing number of categories, but the increase was due to a purely mathematical effect. Transmitted information was estimated by means of computer simulation designed to overcome, in part, small sample bias. This simulator is of potential use to others by helping them calculate transmitted or mutual information accurately using a minimum number of experimental trials. The graph of calculated information against number of trials was found to assume a characteristic shape. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The presence of others may reduce anxiety: The evidence is not conclusive.

States that L. S. Wrightsman's 1975 article provides a needed clarification of the procedures in his 1960 study (see record 1961-05012-001) but fails to consider all aspects of the present author's methodological critique. Other evidence cited by Wrightsman as supporting the notion of a group-produced decrease in self-reported anxiety is not directly relevant to the question of whether Ss who are with others report less anxiety than those who are alone. Regarding this question, the evidence is still inconclusive. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective effects of interference on implicit and explicit memory for new associations.

Examined the effects of interference manipulation on explicit and implicit memory for pairs of normatively unrelated words in 2 experiments, involving 128 undergraduates. Findings show that interference affected explicit memory, as indexed by performance on cued recall, pair matching, and modified free-recall tests, but it did not affect implicit memory, as indexed by performance on a word-completion test. This pattern of results complements several previous findings, including those of the present authors (see PA, Vol 73:12203 and 29150), on performance dissociations between explicit and implicit memory for new associations. (44 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Depression, alcohol use, and smoking over one year: A four-wave longitudinal causal model.

Longitudinal data collected at 4 periods from an adult community sample (N?=?742) were used to study the relationships between depression (Center for Epidemiologic Studies—Depression Scale), alcohol use, and smoking in a latent-variable causal model. Over a 1 yr period, current levels of depression were dependent upon depression levels at all previously measured times. In the short term, alcohol use led to decreased levels of depression, but the long-term causal effects—taking 1 yr to unfold—were that alcohol use led to slightly heightened depression levels. The effects of depression on increased alcohol use was relatively short term. Smoking level was very stable and neither influenced nor was changed by depression. (29 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Judgments about judgments: The dissociation of consideration price and transaction commitment judgments.

There are many contexts in which people make judgments about prior judgments. For example, Internet shopping bots (e.g., NexTag.com) allow consumers to search for products and, if the price is too high, list a price at which they would consider making the purchase (i.e., base judgment). If the price drops to this level, the vendor generates an e-mail inviting the consumer to execute the transaction at the reduced price (i.e., contingent judgment). The authors show that the consideration price depends on the content of retrieved information, whereas the willingness to execute the transaction at the consideration price depends on the ease-of-retrieving the information. The authors use different offer prices to encourage the consumer to retrieve information consistent with different product quality levels. The authors also select offer prices so that information retrieval is more difficult at moderate offer prices than at high or low offer prices. Accordingly, the authors show that the consideration price increases as the offer price increases, but the willingness to execute the transaction at the consideration price is greater when there are high and low, as opposed to moderate, offer prices. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective associations in one-day-old rats: Taste–toxicosis and texture–shock aversion learning.

Three experiments investigated cue-consequence specificity and long-delay learning in 187 1-day-old Sprague-Dawley rats and determined whether selective associations are accompanied by long-delay learning early in life. Ss learned aversions to a novel taste paired with Li-induced distress and to a tactile stimulus paired with brief electric shocks. However, aversions did not develop when taste was paired with shock or when the tactile stimulus was paired with Li treatment. The aversions occurred only when Li treatment immediately followed taste exposure and when shock was concurrent with exposure to the tactile stimulus. Findings indicate that selective associations in aversion learning are mediated by innate mechanisms that govern conditioning in the absence of extensive ontogenetic experience and show that selective associations are not sufficient for the occurrence of long-delay learning. (29 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)