Strength cues and blocking at test promote reliable within-list criterion shifts in recognition memory

In seven experiments, we explored the potential for strength-based, within-list criterion shifts in recognition memory. People studied a mix of target words, some presented four times (strong) and others studied once (weak). In Experiments 1, 2, 4A, and 4B, the test was organized into alternating blocks of 10, 20, or 40 trials. Each block contained lures intermixed with strong targets only or weak targets only. In strength-cued conditions, test probes appeared in a unique font color for strong and weak blocks. In the uncued conditions of Experiments 1 and 2, similar strength blocks were tested, but strength was not cued with font color. False alarms to lures were lower in blocks containing strong target words, as compared with lures in blocks containing weak targets, but only when strength was cued with font color. Providing test feedback in Experiment 2 did not alter these results. In Experiments 3A–3C, test items were presented in a random order (i.e., not blocked by strength). Of these three experiments, only one demonstrated a significant shift even though strength cues were provided. Overall, the criterion shift was larger and more reliable as block size increased, and the shift occurred only when strength was cued with font color. These results clarify the factors that affect participants’ willingness to change their response criterion within a test list.     

Linking Sexism and Speciesism

Some feminists and animal advocates defend what I call the Linked Oppressions Thesis, according to which the oppression of women and the oppression of animals are linked causally, materially, normatively, and/or conceptually. Alasdair Cochrane offers objections to several versions of the Linked Oppressions Thesis and concludes that the Thesis should be rejected in all its forms. In this paper I defend the Thesis against Cochrane's objections as well as objections leveled by Beth Dixon, and argue that the failure of these objections illuminates the idea of linked oppressions as well as misunderstandings of the Linked Oppressions Thesis, and may provide guidance to philosophers theorizing animal rights from a feminist perspective.     

Early Positive Information Impacts Final Evaluations: No Deliberation‐Without‐Attention Effect and a Test of a Dynamic Judgment Model

Evaluation judgments were affected by information order and not by subsequent unconscious versus conscious deliberation. In three experiments, we examined the influence of early positive information on final evaluations of four objects. Based on a task analysis, we predicted primacy effects in judgments in a sequential data acquisition task. Thinking periods following presentation were used to manipulate conscious or unconscious processing. In all three studies, we found no effects of thinking manipulations but instead found reliable order effects. We developed and tested an online judgment model on the basis of the belief updating model of Hogarth and Einhorn. The model accounted for large proportion of the individual level variability, and model comparison tests supported the presence of a primacy effect. Copyright © 2013 John Wiley & Sons, Ltd.     

Predictability and heritability of individual differences in fear learning

Our objective was to characterize individual differences in fear conditioning and extinction in an outbred rat strain, to test behavioral predictors of these individual differences, and to assess their heritability. We fear-conditioned 100 Long-Evans rats, attempted to extinguish fear the next day, and tested extinction recall on the third day. The distribution of freezing scores after fear conditioning was skewed, with most rats showing substantial freezing; after fear extinction, the distribution was bimodal with most rats showing minimal freezing, but a substantial portion showing maximal freezing. Longer rearing episodes measured prior to conditioning predicted less freezing at the beginning of extinction, but differences in extinction learning were not predicted by any baseline exploratory behaviors. We tested the heritability of extinction differences by breeding rats from the top and bottom 20 % of freezing scores during extinction recall. We then ran the offspring through the same conditioning/extinction procedure, with the addition of recording ultrasonic vocalizations throughout training and testing. Only a minority of rats emitted distress vocalizations during fear acquisition, but the incidence was less frequent in the offspring of good extinguishers than in poor extinguishers or randomly bred controls. The occurrence of distress vocalizations during acquisition predicted higher levels of freezing during fear recall regardless of breeding line, but the relationship between vocalization and freezing was no longer evident following extinction training, at which point freezing levels were influenced only by breeding and not by vocalization. The heritability (h ²) of extinction recall was estimated at 0.36, consistent with human estimates.     

The Political Justification of Migrant Workers in Alberta,Canada

Considering a series of oil-driven economic booms, the use of inter-provincial and international migrant labour has become an important part of labour market policy in the Canadian province of Alberta. The increased use of temporary foreign workers is controversial. Narrative analysis of legislators’ statements in the legislature and the press between 2000 and 2011 reveals the government using three narratives to justify policies encouraging greater use of foreign migrant workers: (1) labour shortages require migrant workers, (2) migrants do not threaten Canadian jobs and (3) migrants are not being exploited. Close scrutiny of each narrative demonstrates them to be largely invalid. This suggests a significant disconnect between the real and espoused reasons for the significant changes to labour market policy, changes that advantage employers and disadvantage both Canadian and foreign workers. The findings are relevant to understand the political dynamics of economically related migration.     

Measuring single-item identification efficiencies for letters and 3-D objects

Identification thresholds and the corresponding efficiencies (ideal/human thresholds) are typically computed by collapsing data across an entire stimulus set within a given task in order to obtain a “multiple-item” summary measure of information use. However, some individual stimuli may be processed more efficiently than others, and such differences are not captured by conventional multiple-item threshold measurements. Here, we develop and present a technique for measuring “single-item” identification efficiencies. The resulting measure describes the ability of the human observer to make use of the information provided by a single stimulus item within the context of the larger set of stimuli. We applied this technique to the identification of 3-D rendered objects (Exp. 1) and Roman alphabet letters (Exp. 2). Our results showed that efficiency can vary markedly across stimuli within a given task, demonstrating that single-item efficiency measures can reveal important information that is lost by conventional multiple-item efficiency measures.     

Elevation and mentoring: An experimental assessment of causal relations

Mentoring is a prosocial behavior in which an experienced person guides someone with less experience. Elevation refers to the responses elicited when a person witnesses others upholding the highest standards of moral virtue. Three experimental studies bring these two domains together. For all three studies, participants were randomly assigned to either read a story of someone exhibiting moral excellence or to a control condition. Participants in the elevation condition reported feeling more elevated, more positive attitudes toward mentoring, less negative attitudes toward mentoring, greater intentions to become a mentor (Study 1); an increased proclivity to gather information about becoming a mentor (Study 2a); and, an increased tendency to engage in mentoring directly via submitting advice to students (Study 2b). In their totality, the current studies link another prosocial outcome with elevation and demonstrate a condition under which individuals are more likely to be motivated to become a mentor.     

Asymmetrical access to color and location in visual working memory

Models of visual working memory (VWM) have benefitted greatly from the use of the delayed-matching paradigm. However, in this task, the ability to recall a probed feature is confounded with the ability to maintain the proper binding between the feature that is to be reported and the feature (typically location) that is used to cue a particular item for report. Given that location is typically used as a cue-feature, we used the delayed-estimation paradigm to compare memory for location to memory for color, rotating which feature was used as a cue and which was reported. Our results revealed several novel findings: 1) the likelihood of reporting a probed object’s feature was superior when reporting location with a color cue than when reporting color with a location cue; 2) location report errors were composed entirely of swap errors, with little to no random location reports; and 3) both colour and location reports greatly benefitted from the presence of nonprobed items at test. This last finding suggests that it is uncertainty over the bindings between locations and colors at memory retrieval that drive swap errors, not at encoding. We interpret our findings as consistent with a representational architecture that nests remembered object features within remembered locations.     

USING CALIBRATION AND INTEROBSERVER AGREEMENT ALGORITHMS TO ASSESS THE ACCURACY AND PRECISION OF DATA FROM ELECTRONIC AND PEN‐AND‐PAPER CONTINUOUS RECORDING METHODS

Often it is assumed that electronic recording by observers necessarily provides better quality data than pen‐and‐paper methods. Fifteen novice observers recorded rates of responding from 10 role‐played video samples using one of three continuous recording input formats: keyboard (laptop), touchscreen (personal digital assistants), or pen‐and‐paper. We evaluated the quality of the observers' data compared with criterion records using calibration and interobserver agreement algorithms. Results of the calibration analysis revealed that observers in the touchscreen group produced the most consistently accurate and precise data, the keyboard group observers showed wide variation in precision and accuracy, and the pen‐and‐paper group observers were significantly less precise than the touchscreen group. We conclude that although electronic recording has the potential to be as accurate as, and more precise than, pen‐and‐paper methods, this is far from guaranteed. Analyses of observers' errors advise recommendations for improving data accuracy and precision when using each method. Copyright © 2014 John Wiley & Sons, Ltd.