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J G Seamon

Publications and source records attributed to J G Seamon.

11 recordsLinked to original sources
PubMed1998

The mere exposure effect is differentially sensitive to different judgment tasks.

The mere exposure effect is the increase in positive affect that results from the repeated exposure to previously novel stimuli. We sought to determine if judgments other than affective preference could reliably produce a mere exposure effect for two-dimensional random shapes. In two experiments, we found that brighter and darker judgments did not differentiate target from distracter shapes, liking judgments led to target selection greater than chance, and disliking judgments led to distracter selection greater than chance. These results for brighter, darker, and liking judgments were obtained regardless of whether shape recognition was greater (Experiment 1) or not greater (Experiment 2) than chance. Effects of prior exposure to novel shapes were reliably observed only for affective judgment tasks. These results are inconsistent with general predictions made by the nonspecific activation hypothesis, but not the affective primacy or perceptual fluency hypotheses which were discussed in terms of cognitive neuroscience research.

Adolescent↗
PubMed1998

The role of attention and study time in explicit and implicit memory for unfamiliar visual stimuli.

The effects of limited attentional resources and study time on explicit and implicit memory were studied using Schacter and Cooper's possible and impossible objects in their recognition and object decision paradigm. In one experiment, when attention at study was limited by a flanking digits procedure, object recognition was diminished but object decision priming for possible objects was unaffected; in another experiment, limiting attention plus reducing stimulus study time impaired object recognition and eliminated object priming. Recognition memory and perceptual priming for previously unfamiliar visual stimuli were both influenced by attention, although to different degrees. The intervening variable of study time determined the degree to which priming was affected by attentional resources. These results support a limited capacity attentional model for both recognition and perceptual priming of unfamiliar visual stimuli, and they highlight the need for assessing the interaction of attentional resources and study time in explicit and implicit memory tasks.

Adolescent↗
PubMed1997

A mere exposure effect for transformed three-dimensional objects: effects of reflection, size, or color changes on affect and recognition.

If the mere exposure effect is based on implicit memory, recognition and affect judgments should be dissociated by experimental variables in the same manner as other explicit and implicit measures. Consistent with results from recognition and picture naming or object decision priming tasks (e.g., Biederman & E.E. Cooper, 1991, 1992; L.A. Cooper, Schacter, Ballesteros, & Moore, 1992), the present research showed that recognition memory but not affective preference was impaired by reflection or size transformations of three-dimensional objects between study and test. Stimulus color transformations had no effect on either measure. These results indicate that representations that support recognition memory code spatial information about an object's left-right orientation and size, whereas representations that underlie affective preference do not. Insensitivity to surface feature changes that do not alter object form appears to be a general characteristic of implicit memory measures, including the affective preference task.

Analysis of Variance↗
PubMed1993

Double dissociation of spatial and object visual memory: evidence from selective interference in intact human subjects.

A functional dissociation of the spatial and object visual systems was produced by selective interference in intact young adults. Subjects were instructed to remember the location of a dot in a spatial memory test, and the form of an object memory test. As predicted by current notions of dissociable visual systems in the primate, spatial memory was selectively impaired by a movement discrimination spatial task, whereas object memory was selectively impaired by a color discrimination object task.

Adolescent↗
PubMed1993

An ecological study of professors' memory for student names and faces: a replication and extension.

This experiment measured university professors' memory for the names and faces of current and former students over a two-semester span. If courses function as contextual retrieval cues for professors to remember their students, the passing of each semester should diminish the distinctiveness of these cues. Based on the Bruce and Young (1986) model of face recognition, we hypothesised that as contextual cues become less distinctive, performance should suffer more on name recall tests than on name or face recognition tests. We found that name free recall and portrait-cued name recall declined very sharply after one semester (6 months), and face recognition declined after two semesters (12 months), whereas name recognition remained perfect. These results provide a general replication and extension of Bahrick (1984), and show that difficulties in recalling names cannot be due to any weakening of name representations in memory. We suggest that name recall may be dependent on contextual cues that become less distinctive with succeeding semesters.

Adult↗
PubMed1992

Very long-term memory for odors: retention of odor-name associations.

The ability to remember odor-name associations for recent odors (those associated with everyday products experienced within the past 2 years) and distant odors (those associated with children's toys not encountered for 3 years or more) was examined in two experiments. In recognition tasks, subjects attempted to match odor names to odors, or odors to odor names. In a recall task, subjects tried to identify odors by name. The results showed that although odor retention was better for recent than distant odors, significant retention remains for odors not experienced since childhood. These results are consistent with other studies that found very slow and gradual loss of odor information in memory. They extend that research by showing that odor information is still available over a much longer period of time.

Adolescent↗
PubMed1989

Secondary memory and very rapid forgetting.

Studies of recall in the absence of expectancy (e.g., Muter, 1980) have suggested that forgetting from primary memory is much more rapid than previously assumed. Two experiments examined the role of secondary memory, as reflected by encoding strategies, in determining this rate of forgetting. Experiment 1 demonstrated that the type of encoding specified by orienting tasks can influence recall in a traditional Brown-Peterson task. Experiment 2 demonstrated a similar pattern of effects of orienting task in the Muter task when recall was not expected, despite much more rapid forgetting. The type of encoding engaged by the orienting tasks did not account for Muter's results. Expectancy and orienting task appear to have separable influences on resource allocation during encoding. The presence of secondary memory influences at even the shortest retention interval indicates that forgetting from primary memory may be even more rapid than has been proposed.

Adolescent↗
PubMed1984

Critical importance of exposure duration for affective discrimination of stimuli that are not recognized.

Previous research has found that repeated exposure to briefly presented visual stimuli can increase the positive affect for the stimuli without enhancing their recognition. Subjects could discriminate target and distractor shapes by affective preference in the absence of recognition memory. This study examined this phenomenon as a function of stimulus exposure duration. Over exposure durations of 0, 2, 8, 12, 24, and 48 ms, the functions for affect and recognition judgments exhibited different temporal dynamics. Target selection by affect was possible at very brief exposures and was influenced little by increasing durations; target selection by recognition required longer stimulus exposures and improved with increasing durations. Affective discrimination of stimuli that are not recognized is a reliable phenomenon, but it occurs only within a narrow band of time. This parametric study has specified the relationship between exposure duration and affect and recognition judgments and has located that temporal window.

Adolescent↗
PubMed1983

Affective discrimination of stimuli that are not recognized: effects of shadowing, masking, and cerebral laterality.

Based on his finding that subjects can show an affective preference to previously seen stimuli that they fail to recognize, Zajonc (1980) claimed that affective processing operates separately from cognitive processing. Over four experiments, we replicated and extended the finding that mere exposure to a briefly presented stimulus can increase positive affect through familiarity without enhancing the recognition of that stimulus. Among our findings, lateralized presentation of the irregular polygon stimuli showed that affect judgments were best for stimuli presented in the right visual field (left hemisphere), whereas recognition judgments were best for stimuli presented in the left visual field (right hemisphere). These effects were found only when the study stimuli were shown for 2 msec and were unmasked or for 5 msec and were pattern masked; when the stimuli were shown for 5 msec and were energy masked, target selection by affect or recognition was not greater than chance. These data, along with results from contingency probability analyses, indicate that affect and recognition judgments are different. Rather than viewing the difference between affect and recognition in terms of different features that might reside in the stimulus, the difference in judgments may reflect the manner in which a stimulus representation has been accessed. When viewed in terms of different retrieval processes that access different information, target selection by affect in the absence of recognition can be interpreted in terms of existing models of recognition memory.

Adolescent↗
PubMed1982

Dynamic facial recognition: examination of a natural phenomenon.

Drawing on anecdotal experiences in which former acquaintances meet and recognize each other after years of separation and physiognomic change, six studies sought to determine if dynamic facial recognition was a reliable natural phenomenon. Experiments 1 and 2 found evidence for an ability to recognize age-regressed faces of university faculty and staff. Familiarity, whether real-life or experimentally induced, enhanced recognition of constant and age-regressed pictures. Experiments 3 and 4 found evidence for an ability to recognize age-progressed faces, implying that dynamic facial recognition is a bidirectional cognitive ability found under conditions of intentional and incidental learning. Experiments 5 and 6 used picture-sorting and picture-matching tasks and found that performance was inversely related to the age span and to the amount of facial change between standard and comparison pictures. It was concluded that dynamic facial recognition is a reliable natural phenomenon that can be facilitated by familiarity. Notes on the source of the familiarity effect and the basis for dynamic recognition are provided.

Age Factors↗