Effects of vowel variety and sample lenght on identification of a speaker in a line-up

Subjects (average age 21 years, recruited by personal contact and through a school) were presented with a spoken sentence on tape and then heard six speakers of the same sex, including the original speaker, say the same sentence. They were required to indicate which was the original speaker. The task was repeated with seven different sentences and sets of speakers. One group of subjects heard short sentences containing an average of 2.14 different vowel sounds and 6.28 syllables, another group heard short sentences containing an average of 6.14 vowel sounds (7.28 syllables) and a third group heard longer sentences containing an average of 6.28 vowel sounds (11.00 syllables). Accuracy of speaker identification improved significantly when more vowel sounds were heard, but increased sentence length had no significant effect on performance. Performance was significantly better when the listener was the same sex as the speaker than when the listener was of the other sex.     

Stress and work performance: The role of trait anxiety

Employees high in Trait Anxiety (TA) were found to exert greater work effort than those low in TA, which resulted in better sales performance. There was no relation between TA and work efficiency, measured by sales performance relative to work effort. Employees high in TA also reported greater levels of stress and more adverse effects of work on non-work relationships. Using multiple regression, both stress and interference with relationships were found to be better predicted by TA than work effort. The results are discussed in terms of laboratory-based theories about relations between TA and efficiency and intervention strategies for managing stress at work.     

Semantic interference from subliminal stimuli in a dichoptic viewing situation

In Expt 1 subjects named words, shapes or colours presented to one eye while words or shapes were presented to the other eye subliminally. The subliminal stimuli were found to slow naming responses when they had the same name as the stimulus to be named or a closely related name, compared with random letter strings or blank cards. This result was replicated in a second experiment which also included unrelated words as subliminal stimuli. On these trials latencies were midway between those for trials with blank cards or random letter strings as the subliminal stimuli, and trials with the same name or a closely related name as the subliminal stimuli. The results imply that stimuli related in meaning compete for common analysing mechanisms.     

Sex differences and individual consistency in voice identification

Results were combined from 5 experiments by Cook in 1998 with 728 participants who listened to one male voice and one female voice each saying a sentence, then attempted to recognise the voices from line-ups of six voices presented a week later. While 352 male listeners did not differ significantly in recognising female and male voices (38% correct vs 41%), 376 female listeners were significantly more likely to recognise female than male voices (51% vs 43% correct). There was no evidence for individual differences in voice recognition in that listeners who recognised the male voice were no more likely to recognise the female voice than those who failed to recognise the male voice.     

Framing Ethical Acceptability: A Problem with Nuclear Waste in Canada

Ethical frameworks are often used in professional fields as a means of providing explicit ethical guidance for individuals and institutions when confronted with ethically important decisions. The notion of an ethical framework has received little critical attention, however, and the concept subsequently lends itself easily to misuse and ambiguous application. This is the case with the ??ethical framework?? offered by Canada??s Nuclear Waste Management Organization (NWMO), the crown-corporation which owns and is responsible for the long-term management of Canada??s high-level nuclear fuel waste. It makes a very specific claim, namely that it is managing Canada??s long-lived radioactive nuclear fuel waste in an ethically responsible manner. According to this organization, what it means to behave in an ethically responsible manner is to act and develop policy in accordance with its ethical framework. What, then, is its ethical framework, and can it be satisfied? In this paper I will show that the NWMO??s ethical and social framework is deeply flawed in two respects: (a) it fails to meet the minimum requirements of a code of ethic or ethical framework by offering only questions, and no principles or rules of conduct; and (b) if posed as principles or rules of conduct, some of its questions are unsatisfiable. In particular, I will show that one of its claims, namely that it seek informed consent from individuals exposed to risk of harm from nuclear waste, cannot be satisfied as formulated. The result is that the NWMO??s ethical framework is not, at present, ethically acceptable.     

Memory rehabilitation: restorative,specific knowledge acquisition,compensatory, and holistic approaches

Cognitive Processing - Memory impairment following an acquired brain injury can negatively impact daily living and quality of life—but can be reduced by memory rehabilitation. Here, we review...     

Independence of slope and intercept in Sternberg's memory-scanning paradigm

Negative correlations have been obtained over subjects between slopes and intercepts in memoryscanning tasks. It is argued that such correlations are to be expected on purely statistical grounds. Predictions for such correlations are derived and compared with data from a large scale experiment of this type. A satisfactory match is obtained.