Through neural stimulation to behavior manipulation: a novel method for analyzing dynamical cognitive models

The dynamical systems' approach to cognition (Dynamicism) promises computational models that effectively embed cognitive processing within its more natural behavioral context. Dynamical cognitive models also pose difficult, analytical challenges, which motivate the development of new analytical methodology. We start by illustrating the challenge by applying two conventional analytical methods to a well-known Dynamicist model of categorical perception. We then introduce our own analysis, which works by analogy with neural stimulation methods, and which yields some novel insights into the way the model works. We then extend and apply the method to a second Dynamicist model, which captures the key psychophysical trends that emerge when humans and animals compare two numbers. The results of the analysis-which reveals units with tuning functions that are monotonically related to the magnitudes of the numbers that the agents must compare-offer a clear contribution to the contentious debate concerning the way number information is encoded in the brain.     

Facilitating memory‐based lie detection in immediate and delayed interviewing: The role of mnemonics

We experimentally investigated how different mnemonic techniques employed in an interview conducted immediately after an event affected truth tellers' and liars' responses when they were interviewed again after a 2‐week delay. We also compared how verbal accounts changed over time within truth tellers and liars, and how consistent both groups were. Participants (n = 143) were shown a mock intelligence operation video and instructed either to tell the truth or lie about its contents in two interviews, one of which was immediately after watching the video and the other after a 2‐week delay. In the immediate interview, they were asked to provide a free recall and then asked to provide further information via one of three mnemonics: context reinstatement, sketch, or event‐line. In the delayed interview, they were asked to provide only a free recall. Truth tellers reported more visual, spatial, temporal, and action details than did liars both immediately and after a delay. Truth tellers experienced more of a decline in reporting details after a delay than did liars, and this decline was affected by the mnemonic used. Truth tellers thus showed, more than liars, patterns of reporting indicative of genuine memory decay. Liars produced patterns of a “stability bias” instead. Truth tellers and liars were equally consistent between their immediate and delayed statements.     

Face value: testing the utility of contextual face cues for face recognition

The presence of multiple faces during a crime may provide a naturally-occurring contextual cue to support eyewitness recognition for those faces later. Across two experiments, we sought to investigate mechanisms underlying previously-reported cued recognition effects, and to determine whether such effects extended to encoding conditions involving more than two faces. Participants studied sets of individual faces, pairs of faces, or groups of four faces. At test, participants in the single-face condition were tested only on those individual faces without cues. Participants in the two and four-face conditions were tested using no cues, correct cues (a face previously studied with the target test face), or incorrect cues (a never-before-seen face). In Experiment 2, associative encoding was promoted by a rating task. Neither hit rates nor false-alarm rates were significantly affected by cue type or face encoding condition in Experiment 1, but cuing of any kind (correct or incorrect) in Experiment 2 appeared to provide a protective buffer to reduce false-alarm rates through a less liberal response bias. Results provide some evidence that cued recognition techniques could be useful to reduce false recognition, but only when associative encoding is strong.     

The effects of co-witness discussion on confidence and precision in eyewitness memory reports

We examined the influence of co-witness discussion on the metacognitive regulation of memory reports. Participants (N?=?92) watched a crime video. Later, a confederate confidently agreed with (gave confirming feedback), disagreed with (gave disconfirming feedback), or gave no feedback (control) regarding participants’ answers to questions about the video. Participants who received disconfirming feedback reported fewer fine-grain details than participants in the confirming and control conditions on a subsequent, individual recall test for a different question set. Unexpectedly, this decrease in fine-grain reporting was not accompanied by a decrease in participants’ confidence in the accuracy of their fine-grain responses. These results indicate that receiving social comparative feedback about one’s memory performance can affect rememberers’ metamemorial control decisions, and potentially decrease the level of detail they volunteer in later memory reports. Further research is needed to assess whether these results replicate under different experimental conditions, and to explore the effects of social influences on metamemory.     

Perfectionism and the pursuit of personal goals: A self-determination theory analysis

Previous studies have shown that self-critical and personal standards forms of perfectionism are associated with progress on personal goals in opposite ways. The present study used a 5-wave prospective longitudinal design to examine what motivational factors account for the finding that self-critical perfectionism has been reliably associated with poor goal progress whereas personal standard perfectionism has been associated with good progress. Specifically, we adopted a self-determination theory perspective to examine the role of autonomy in mediating the effects of perfectionism. Our results replicated previous findings linking the two forms of perfectionism with opposite patterns of goal progress. Importantly, the results suggested that the negative goal effects of self-critical perfectionism are mediated by lower levels of autonomous goal motivation. The results also demonstrated links from personal standards perfectionism to greater autonomous goal motivation. Interestingly, the effects of self-critical perfectionism on goal progress appeared to be dynamic over time and implicated affective mechanisms. The results of the investigation point to the value of adopting a self-determination theory perspective to understand perfectionism.     

Independently Licensed Counselors' Work Values

Prospective clinical mental health counseling students need to know if their work values align with those of independently licensed counselors before investing their time and accumulating debt. Analyzing the work values of 463 independently licensed counselors in the United States, we found 89% expressing social (altruistic) work values and 22% expressing intrinsic work values. Independently licensed counselors want to help clients become fully functioning and self-actualized by maintaining unconditional positive regard, being congruent, and providing empathy. Clarifying these work values and their interaction can help prospective and current clinical mental health counseling students determine their future job role.     

Gender expectations for alcohol use: A study of the significance of the masculine role

One hundred sixteen undergraduates assigned traditional gender-stereotyping adjectives and adjective phrases to two male and two female stimuli. Included in this set of traits were statements regarding drinking beer, drinking wine, and getting drunk. Results indicated that male stimuli were attributed stereotypically masculine traits (e.g., acts as a leader, is willing to take risks), and were attributed both beer drinking and getting drunk significantly more often than the female stimuli. By contrast, female stimuli were attributed stereotypically feminine traits (e.g., dependent, sensitive) and were attributed wine drinking significantly more often than the male stimuli. These data provide direct evidence that expectations regarding beer drinking and getting drunk are aspects of the traditional male gender role. The social and mental health implications of the findings are discussed.