Coming to terms with stress: Effects of stress location in sentence processing

The purpose of this research was to determine the role of syllabic stress in language processing during the early on-line processing of speech and later in the representation of a sentence in memory. Experiment 1 used a syllable monitoring task while Experiment 3 used a probe task in which subjects heard a sentence and then were asked to determine whether a probe syllable had occurred in the sentence. In the monitoring task, stressed syllables were detected more rapidly in word-initial position, but unstressed syllables were detected more rapidly in word-final position. Stress facilitation in initial syllables was strongly related to high relative F0, but not to changes in perceived vowel quality as assessed in Experiment 2. This pattern is interpreted as evidence that lexical stress is used on-line to guide lexical access and/or lexical segmentation. The probe task of Experiment 3 showed stress facilitation in both positions, indicating that stress is independently retained in the postperceptual representation of a sentence.The research reported in this paper was supported by grant 80-0416 to Harvard University (Peter C. Gordon, Principal Investigator) from the Air Force Office of Scientific Research Life Sciences Directorate. We thank Chris Thurber for his extensive and competent assistance in testing subjects and making acoustic measurements, and Jay Rueckl for comments on an earlier version of this paper     

Reverse causation in activity-cognitive ability associations: the Lothian Birth Cohort 1936

Active lifestyles might protect cognitive abilities; however, studies rarely consider the reverse causal direction. Activity-cognition associations might reflect stable intelligence differences rather than a protective effect of activity. The Lothian Birth Cohort 1936 (n = 1091) completed cognitive tests aged 70, having taken an intelligence test aged 11. Activity (assessed by participation in 15 activities that produced a socio-intellectual activity factor, and by physical activity) was positively associated with cognition (r = .08 to .32, p ≤ .05). When age-11 IQ and adult social class were controlled, only physical activity remained significantly associated with general cognitive ability and processing speed.     

The cortical organization of lexical knowledge: a dual lexicon model of spoken language processing

Current accounts of spoken language assume the existence of a lexicon where wordforms are stored and interact during spoken language perception, understanding and production. Despite the theoretical importance of the wordform lexicon, the exact localization and function of the lexicon in the broader context of language use is not well understood. This review draws on evidence from aphasia, functional imaging, neuroanatomy, laboratory phonology and behavioral results to argue for the existence of parallel lexica that facilitate different processes in the dorsal and ventral speech pathways. The dorsal lexicon, localized in the inferior parietal region including the supramarginal gyrus, serves as an interface between phonetic and articulatory representations. The ventral lexicon, localized in the posterior superior temporal sulcus and middle temporal gyrus, serves as an interface between phonetic and semantic representations. In addition to their interface roles, the two lexica contribute to the robustness of speech processing.     

Vision and intelligence at age 83 in the Lothian Birth Cohort 1921

The extent to which visual function, measured as near and distant visual acuity and contrast sensitivity, is correlated with concurrently measured cognitive function and prior intellectual ability was investigated in a narrow age range group known as the Lothian Birth Cohort of 1921 (LBC1921). Participants were aged ~ 83 years at the time of testing (N = 321). A well-fitting structural equation model highlighted a significant contribution of a latent visual trait to a general fluid intelligence factor in old age, independent of the contribution from childhood intelligence. Additionally, childhood intelligence made a significant contribution to the general visual factor in old age. However, the model fitted equally well when the fluid intelligence factor is assumed to be a cause of the visual function latent trait, in which case childhood intelligence does not significantly influence vision in old age. We discuss these results with respect to four possible mechanisms by which vision and cognition can come to be correlated over the lifecourse.     

Why Externalist Representationalism is a Form of Disjunctivism

Externalist representationalism is touted as a superior rival to naïve realism, and yet a careful analysis of the externalist representationalist's analysis of our ordinary perceptual experiences shows the view to be far closer to naïve realism than we might have expected. One of the central advertised benefits of representationalist views in general is that they are compatible with the idea that ordinary, illusory and hallucinatory perceptual experiences are of the same fundamental kind. Naïve realists are forced to deny the ‘common fundamental kind claim’ and adopt disjunctivism. However, I argue that externalist representationalism is also a version of disjunctivism. Consequently, one of the main rivals to naïve realism turns out not to be a rival at all.     

Feature parsing: feature cue mapping in spoken word recognition

For listeners to recognize words, they must map temporally distributed phonetic feature cues onto higher order phonological representations. Three experiments are reported that were performed to examine what information listeners extract from assimilated segments (e.g., place-assimilated tokens of cone that resemble comb) and how they interpret it. Experiment 1 employed form priming to demonstrate that listeners activate the underlying form of CONE, but not of its neighbor (COMB). Experiment 2 employed phoneme monitoring to show that the same assimilated tokens facilitate the perception of postassimilation context. Together, the results of these two experiments suggest that listeners recover both the underlying place of the modified item and information about the subsequent item from the same modified segment. Experiment 3 replicated Experiment 1, using different postassimilation contexts to demonstrate that context effects do not reflect familiarity with a given assimilation process. The results are discussed in the context of general auditory grouping mechanisms.     

On valid and reliable identification of normal disfluencies and stuttering disfluencies: a response to Aram, Meyers, and Ekelman (1990)

Aram, Meyers, and Ekelman (1990, Brain and Language, 38, 105-121) recently reported finding that children with unilateral brain lesions produced more stuttering-type nonfluencies than their neurologically normal peers. However, they did not report inter- or intrajudge agreement for the nonfluency types or for their method of measuring speech rate. The speech rates they reported were also unusually fast. We argue that these problems with Aram et al.'s study imperil both their results and their conclusions regarding developmental stuttering.     

An evaluation of the reliability and construct validity of eating disorder measures in White and Black women

Most measures of eating disorder symptoms and risk factors were developed in predominantly White female samples. Yet eating disorders affect individuals of all racial and ethnic backgrounds. Black women appear more vulnerable to certain forms of eating pathology, such as binge eating, and less susceptible to other eating disorder symptoms and risk factors, such as body dissatisfaction, compared with their White peers. Despite concern that extant measures do not adequately assess eating concerns among Black women, the construct validity of scores on most of these measures has not been adequately examined within this population. This study included 2,208 Black and White women who completed the following: the Binge Eating Scale (BES), the Eating Disorder Diagnostic Scale (EDDS), the Eating Attitudes Test-26 (EAT-26), the Eating Disorder Inventory Body Dissatisfaction and Drive for Thinness subscales, the Bulimia Test-Revised (BULIT-R), the Multidimensional Body-Self Relations Questionnaire-Appearance Evaluation subscale (MBSRQ-AE), and the Objectified Body Consciousness Scale (OBCS). Most measures yielded internally consistent scores in both races. Confirmatory factor analyses indicated that loadings for some measures, including the EAT-26 and EDDS, were not invariant across groups and thus do not assess equivalent constructs in White and Black women. However, others, including the BULIT-R, BES, OBCS, and MBSRQ-AE, exhibited factorial invariance in both races. Results suggest scores are likely not equivalent across races for several popular measures of eating disorder symptoms and risk factors. Thus, it is recommended that researchers and clinicians obtain additional information regarding racial/cultural factors when using these instruments with Black women.     

Religious attributions pertaining to the causes and cures of mental illness

In this Australian study, 126 Protestant Christian participants, 52 females and 74 males, were assessed for their beliefs about the importance of 26 causal variables and 25 treatment variables for two mental disorders: Major Depression and Schizophrenia. Factor analysis revealed four causal factors, common to both conditions, labelled as religious factors, physical factors, coping style and social/environmental stressors. Furthermore, four treatment factors emerged: religious means, professional help, help from others (non-professional) and self-initiated means. Explanatory variables for these beliefs were assessed using: a Religious Beliefs Inventory (RBI) to measure religious beliefs; a Values Survey (VS) including a measure of Christian religious values; and a Religion and Mental Health Inventory (RMHI) to measure cognitive dissonance (cf. Festinger, 1957 Festinger L 1957 A Theory of cognitive dissonance Evanston IL Row & Peterson  [Google Scholar]) between religious faith and perceptions of mental-health principles. The results revealed that religious beliefs, religious values and cognitive dissonance function as predictors of the attribution of the causes and treatments, for Major Depression and Schizophrenia, to religious factors. An additional finding of this study was that 38.2% of the participants endorsed a demonic aetiology of Major Depression, and 37.4% of the participants endorsed a demonic aetiology of Schizophrenia.