Control of reflexive and voluntary saccades in the gap effect

In two experiments, we examined whether voluntary and reflexive saccades shared a common fixation disengagement mechanism, Participants were required to perform a variety of tasks, each requiring a different level of information processing of the display prior to execution of the saccade. In Experiment 1, participants executed either a prosaccade or an antisaccade upon detecting a stimulus array. In Experiment 2, participants executed a prosaccade to a stimulus array only if the array contained a target item. The target could be a line (easy search) or a digit (difficult search). The critical manipulation in both experiments was the relative timing between the removal of the fixation stimulus and the onset of the stimulus array. In both experiments, it was found that saccadic latencies were shortest when the fixation stimulus was removed before the onset of the stimulus array—a gap effect. It was concluded that reflexive and voluntary saccades share a common fixation disengagement mechanism that is largely independent of higher level cognitive processes.     

Training Japanese listeners to identify English /r/and /l/: Long-term retention of learning in perception and production

Previous work from our laboratories has shown that monolingual Japanese adults who were given intensive high-variability perceptual training improved in both perception and production of English /r/-/l/ minimal pairs. In this study, we extended those findings by investigating the long-term retention of learning in both perception and production of this difficult non-native contrast. Results showed that 3 months after completion of the perceptual training procedure, the Japanese trainees maintained their improved levels of performance on the perceptual identification task. Furthermore, perceptual evaluations by native American English listeners of the Japanese trainees’ pretest, posttest, and 3-month follow-up speech productions showed that the trainees retained their long-term improvements in the general quality, identifiability, and overall intelligibility of their English /r/-/l/ word productions. Taken together, the results provide further support for the efficacy of high-variability laboratory speech sound training procedures, and suggest an optimistic outlook for the application of such procedures for a wide range of “special populations.” nt]mis|This work was supported by NIDCD Training Grant DC-00012 and by NIDCD Research Grant DC-00111 to Indiana University.     

The importance of semantic similarity to the irrelevant speech effect

Irrelevant speech disrupts immediate recall of a short sequence of items. Salamé and Baddeley (1982) found a very small and nonsignificant increase in the irrelevant speech effect when the speech comprised items semantically identical to the to-be-remembered items, leading subsequent researchers to conclude that semantic similarity plays no role in the irrelevant speech effect. Experiment 1 showed that strong free associates of the to-be-remembered items disrupted serial recall to a greater extent than words that were dissimilar to the to-be-remembered items. Experiment 2 showed that this same pattern of disruption in a free recall task. Theoretical implications of these findings are discussed.     

Shades of the mirror effect: Recognition of faces with and without sunglasses

A mirror effect was found for a stimulus manipulation introduced at test. When subjects studied a set of normal faces and then were tested with new and old faces that were normal or wearing sunglasses, the hit rate was higher and the false alarm rate was lower for normal faces. Hit rate differences were reflected in remember and sure recognition responses, whereas differences in false alarm rates were largely seen in know and unsure judgments. In contrast, when subjects studied faces wearing sunglasses, the hit rate was greater for test faces with sunglasses than for normal faces, but there was no difference in false alarm rates. These findings are problematic for single-factor theories of the mirror effect, but can be accommodated within a two-factor account.     

(Non)Complementary updating of belief in two hypotheses

Past research has led to the conclusion that two competing hypotheses are represented dependently, and confidence in them is updated in a complementary manner. It is argued here that confidence in two hypotheses can be represented either dependently or independently. Changes in confidence in the former case are always complementary, but changes in the latter case are complementary only under certain conditions. In three simulated medical diagnosis experiments, subjects learned about two illnesses in a manner expected to lead to either dependent or independent confidence. They were then presented with two symptoms sequentially (for each of several patients), updating confidence after each. Experiment 1 demonstrated that changes in confidence in the two illnesses were largely complementary for subjects with dependent, but not independent, confidence. Experiment 2 showed that encouraging consideration of the alternative led to more complementary changes for subjects with independent confidence. Experiment 3 succeeded in producing complementary changes from these subjects. Thus, complementarity does not imply dependent confidence, nor does independent confidence imply non-complementarity.     

A grouping interpretation of the modality effect in immediate probed recognition

In a series of experiments on immediate probed recognition for eight 3-digit numbers, it was shown that if the target modality involved auditory components and the effect of the similarity of the modality of the probe to that of the targets was controlled, unequivocal evidence was obtained for an auditory superiority effect (modality effect) for hit rates for the final items of the list. Moreover, false-alarm rates were significantly lower following targets with an auditory component than they were following silently seen targets. It is argued that this pattern of hits and false alarms is consistent with the idea that targets that have an auditory component yield memory representations that are better grouped as units than are those for targets that are only silently seen; in particular, if a new probe has a first digit that accidentally matches the first digit of a target item, it is more likely that the subject will mistakenly identify this new probe as old (give a false alarm) if the target has only been partially encoded because it was only silently seen.     

Gender Differences in Memory Perspectives: Evidence for Self-Objectification in Women

This study tests Fredrickson and Roberts' (1997)assertion that cultural practices of sexuallyobjectifying women's bodies socialize women tointernalize an observer's perspective on their physicalselves. Autobiographical memories can contain imagesfrom two perspectives: the original, first personperspective (field images) and that of an outsideobserver (observer images) (Nigro and Neisser, 1983). We collected autobiographical memories for eventsin general and for specific, potentially objectifyingsituations from a predominantly European-American sampleof 138 female and 104 male students at a private university. Results demonstrated that femaleparticipants reported more observer imagery than maleparticipants both for memories in general and formemories of certain situations wherein women are likely to be sexually objectified. Women's and men'semotional responses to these situations were alsodifferent, with women reporting more negative affect,including shame and anxiety, and less positiveaffect.     

Dating Relationships and the Demand/Withdraw Pattern of Communication

This study examines whether afemale-demand/male-withdraw pattern occurs in datingrelationships and whether this response increases duringdiscussions of difficult topics. One hundred and eightindividuals (women = 60, men = 48) currently in a datingrelationship completed the Communication PatternsQuestionnaire, Short Form (CPQSF) regarding either adifficult or nondifficult discussion. The racialcomposition of the undergraduate student population at thetime the study was conducted was 68.8% Caucasian, 8.9%Hispanic, 8.9% International, 6.0% African American,5.6% Asian American, and 1.8% Native American (data on socioeconomic status were unavailable).Results show that dating couples do employ apredominantly female-demand/male-withdraw pattern, whichincreases in response to difficult discussions. However, this study also found that many dating couplesemployed male-demand/female-withdraw or equaldemand/withdraw patterns. Post hoc tests also showedthat couples exhibiting eitherfemale-demand/male-withdraw or male-demand/female-withdraw patterns weremore ingrained in specific negative behavior patterns,employed more demand/withdraw behaviors, and exhibitedless positive behaviors than couples with an equal demand/withdraw pattern.