Evidence for working memory storage operations in perceptual cortex

Isolating the short-term storage component of working memory (WM) from the myriad of associated executive processes has been an enduring challenge. Recent efforts have identified patterns of activity in visual regions that contain information about items being held in WM. However, it remains unclear (1) whether these representations withstand intervening sensory input and (2) how communication between multimodal association cortex and the unimodal perceptual regions supporting WM representations is involved in WM storage. We present evidence that the features of a face held in WM are stored within face-processing regions, that these representations persist across subsequent sensory input, and that information about the match between sensory input and a memory representation is relayed forward from perceptual to prefrontal regions. Participants were presented with a series of probe faces and indicated whether each probe matched a target face held in WM. We parametrically varied the feature similarity between the probe and target faces. Activity within face-processing regions scaled linearly with the degree of feature similarity between the probe face and the features of the target face, suggesting that the features of the target face were stored in these regions. Furthermore, directed connectivity measures revealed that the direction of information flow that was optimal for performance was from sensory regions that stored the features of the target face to dorsal prefrontal regions, supporting the notion that sensory input is compared to representations stored within perceptual regions and is subsequently relayed forward. Together, these findings indicate that WM storage operations are carried out within perceptual cortex.     

Catholic Social Teaching as a Framework for Research Ethics

The importance of having ethical oversight in research that is carried out on humans is well established. Research ethics, which is mainly influenced by a biomedical ethical framework, aims to ensure that the well-being and the rights of research participants are upheld and that any potential risks and harms are reduced. However, research is also considered to be a social activity with social effects. Therefore the principles of Catholic Social Teaching as a framework for research ethics may be significant. This paper outlines those principles and demonstrates how these principles may be used for: (1) reflecting ethically on research (i.e. before the project begins), (2) judging a research ethics proposal (i.e. the ethical review) and (3) providing guidelines for action in research (i.e. the implementation of the research project).     

The way I make you feel: How relatedness and compassionate goals promote partner’s relationship satisfaction

Research has investigated the role of three basic psychological needs as proposed by Self-Determination Theory – autonomy, competence, and relatedness – in explaining relationship satisfaction. Research has also explored how relatedness specifically increases prosocial motivations in the individual but has not focused on the role of relatedness in shaping partners’ relationship functioning over time. This research takes a dyadic perspective that proposes that relatedness fulfillment fosters compassionate goals, which in turn predict increases in partner’s satisfaction. Forty-five heterosexual dating couples were asked about their relatedness need fulfillment, compassionate goals, and relationship satisfaction. Relationship satisfaction was assessed again four weeks later. Results showed that one’s own relatedness fulfillment, but not one’s partner’s relatedness fulfillment at Time 1 uniquely predicts partner’s increased satisfaction at Time 2, and that this is mediated by one’s own higher compassionate goals. These findings highlight the dyadic importance of having one’s needs met in promoting relationship functioning over time.     

This Is Like That: Metaphors in Public Discourse Shape Attitudes

A metaphoric framing is a message comparing an abstract concept (e.g., the economy) to a dissimilar concept that is more concrete and easier to comprehend (e.g., a vehicle). Metaphoric framings are commonly used in public discourse (e.g., magazine editorials, political campaign advertisements) to communicate about controversial sociopolitical issues. These messages are not mere figures of speech. Mounting evidence shows that even brief exposure to a metaphoric framing can prompt observers to transfer their knowledge of the metaphor's concrete concept to interpret analogous features of the target issue, even though the two concepts are superficially quite different. This article reviews this evidence, demonstrating that the metaphors pervading everyday communication uniquely shape how people think and feel about a host of important issues. The authors draw on theories of motivated social cognition to chart avenues for future research on the situational factors that moderate metaphor's impact on attitudes.     

Hide and seek: The theory of mind of visual concealment and search

Researchers have investigated visual search behavior for almost a century. During that time, few studies have examined the cognitive processes involved in hiding items rather than finding them. To investigate this, we developed a paradigm that allowed participants to indicate where they would hide (or find) an item that was to be found (or hidden) by a friend or a foe. We found that (i) for friends more than foes, participants selected the pop-out item in the display, and (ii) when the display was homogeneous, they selected nearby and corner items. These behaviors held for both hiding and finding, although hide and find behaviors were not identical. For pop-out displays, decision times were unusually long when hiding an item from a foe. These data converge on the conclusion that the principles of search and concealment are similar, but not the same. They also suggest that this paradigm will provide researchers a powerful method for investigating theory of mind in adults.     

How undistorted spatial memories can produce distorted responses

Reproducing the location of an object from the contents of spatial working memory requires the translation of a noisy representation into an action at a single location—for instance, a mouse click or a mark with a writing utensil. In many studies, these kinds of actions result in biased responses that suggest distortions in spatial working memory. We sought to investigate the possibility of one mechanism by which distortions could arise, involving an interaction between undistorted memories and nonuniformities in attention. Specifically, the resolution of attention is finer below than above fixation, which led us to predict that bias could arise if participants tend to respond in locations below as opposed to above fixation. In Experiment 1 we found such a bias to respond below the true position of an object. Experiment 2 demonstrated with eye-tracking that fixations during response were unbiased and centered on the remembered object’s true position. Experiment 3 further evidenced a dependency on attention relative to fixation, by shifting the effect horizontally when participants were required to tilt their heads. Together, these results highlight the complex pathway involved in translating probabilistic memories into discrete actions, and they present a new attentional mechanism by which undistorted spatial memories can lead to distorted reproduction responses.