Is scent‐enhanced memory immune to retroactive interference?

Research shows that scent enhances memory for associated information. Current debate centers around scent's immunity to “retroactive interference,” i.e., reduced memory for earlier-learned information after exposure to additional, subsequently-learned information. This paper demonstrates that scent-enhanced memory is indeed prone to retroactive interference, but that some of the information lost is restored using a scent-based retrieval cue. Two process explanations for interference effects are proposed, with the evidence providing more support for an inhibition rather than a response competition explanation. The results enhance our understanding of the encoding and retrieval of olfactory information from long-term memory, and reasons why interference occurs.     

Earwitness memory: distortions for voice pitch and speaking rate

In two experiments, memory distortions for voice pitch and speaking rate were examined. In both experiments, a significant distortion effect for voice pitch was observed, with listeners biased towards selecting voices lower in pitch than low‐pitch targets and selecting voices higher in pitch than high‐pitch targets. In contrast, for speaking rate there was little evidence for the production of memory distortions. The results are discussed in terms of transient surface properties of speech and how transience may be a factor in producing distortions. The results have implications for how errors arise during earwitness testimony for a suspect's voice. Copyright © 2009 John Wiley & Sons, Ltd.     

Exploring the superadditive effects of scent and pictures on verbal recall: An extension of dual coding theory

This research extends the dual coding theory of memory retrieval (Paivio 1969, 2007) beyond its traditional focus on verbal and pictorial information to olfactory information. We manipulate the presence or absence of olfactory and pictorial stimuli at the time of encoding (study 1) or retrieval (study 2) and measure the impact on verbal recall. After a time delay, scent enhances recall of verbal information, and scent-based retrieval cues potentiate the facilitative effect of pictures on recall. These results cannot be attributed merely to increased elaboration at the time of exposure.     

Complicity and the Rwandan Genocide

The Rwandan genocide of 1994 occurred due to widespread complicity. I will argue that complicity can be the basis for legal liability, even for criminal liability, if two conditions are met. First, the person’s actions or inactions must be causally efficacious at least in the sense that had the person not committed these actions or inactions the harm would have been made significantly less likely to occur. Second, the person must know that her actions or inactions risk contributing to a harmful enterprise, and must intend that these actions or inactions risk making this contribution. But it is not part of this analysis that the defendant must intend the harmful result. I explore the boundaries between legal and moral complicity and end with a discussion of how the analysis defended in the paper affects such questions as how many people in Rwanda should be prosecuted for the genocide which occurred due to widespread complicity.     

Using eye-tracking to study audio-visual perceptual integration

Perceptual integration of audio-visual stimuli is fundamental to our everyday conscious experience. Eye-movement analysis may be a suitable tool for studying such integration, since eye movements respond to auditory as well as visual input. Previous studies have shown that additional auditory cues in visual-search tasks can guide eye movements more efficiently and reduce their latency. However, these auditory cues were task-relevant since they indicated the target position and onset time. Therefore, the observed effects may have been due to subjects using the cues as additional information to maximize their performance, without perceptually integrating them with the visual displays. Here, we combine a visual-tracking task with a continuous, task-irrelevant sound from a stationary source to demonstrate that audio-visual perceptual integration affects low-level oculomotor mechanisms. Auditory stimuli of constant, increasing, or decreasing pitch were presented. All sound categories induced more smooth-pursuit eye movement than silence, with the greatest effect occurring with stimuli of increasing pitch. A possible explanation is that integration of the visual scene with continuous sound creates the perception of continuous visual motion. Increasing pitch may amplify this effect through its common association with accelerating motion.     

A path analysis of factors associated with distress among first-degree female relatives of women with breast cancer diagnosis.

Patterns and predictors of psychological distress in first-degree female relatives (N = 624) of newly diagnosed breast cancer patients were explored. First-degree female relatives who were high monitors reported greater cancer-specific and general distress than did low monitors. Greater optimism was associated with lower cancer-specific distress. Optimism's effect on general distress was moderated by women's level of monitoring. Greater optimism was associated with lower general distress for both high and low monitors, but the effect was stronger for high monitors than for low monitors. Avoidance and engaged coping were associated with higher distress. A close relationship with the cancer patient was related to higher cancer-specific distress but lower general distress. Further understanding of the process of adjustment in these women awaits longitudinal study.     

Emotional availability and psychosocial correlates among mothers in substance‐abuse treatment and their young infants

Emotional availability (EA) was investigated among low‐income mothers enrolled in substance‐abuse treatment and their young infants (n = 21) compared with a demographically matched group of mother–infant pairs who, by self‐report, were not at risk for substance abuse (n = 27). The mother–infant dyads in the treatment group generally demonstrated poorer EA functioning than those in the comparison group, but few differences between the groups on individual dimensions of EA were significant. This finding was notable considering that mothers in treatment reported significantly higher levels of depressive symptoms and psychological stress. Treatment effects may have buffered the negative impact of depression and psychological stress on mothers' EA scores. The clinical implications of the findings are discussed as they relate to substance‐abuse‐treatment services for pregnant and parenting women.     

A randomized trial of skin cancer prevention in aquatics settings: the Pool Cool program.

Skin cancer is increasing, and prevention programs are essential. This study evaluated the impact of a skin cancer prevention program on sun-protection habits and swimming pool environments. The intervention included staff training; sun-safety lessons; interactive activities; providing sunscreen, shade, and signage; and promoting sun-safe environments. A randomized trial at 28 swimming pools in Hawaii and Massachusetts tested the efficacy of this program (Pool Cool) compared with an attention-matched injury-prevention control program. Results showed significant positive changes in children's use of sunscreen and shade, overall sun-protection habits, and number of sunburns and improvements in parents' hat use, sun-protection habits, and reported sun-protection policies and environments. Observations corroborated the positive findings. Pool Cool had significant positive effects at swimming pools in diverse audiences.