Exploring the measurement of markedness and its relationship with other linguistic variables

Antonym pair members can be differentiated by each word's markedness-that distinction attributable to the presence or absence of features at morphological or semantic levels. Morphologically marked words incorporate their unmarked counterpart with additional morphs (e.g., "unlucky" vs. "lucky"); properties used to determine semantically marked words (e.g., "short" vs. "long") are less clearly defined. Despite extensive theoretical scrutiny, the lexical properties of markedness have received scant empirical study. The current paper employs an antonym sequencing approach to measure markedness: establishing markedness probabilities for individual words and evaluating their relationship with other lexical properties (e.g., length, frequency, valence). Regression analyses reveal that markedness probability is, as predicted, related to affixation and also strongly related to valence. Our results support the suggestion that antonym sequence is reflected in discourse, and further analysis demonstrates that markedness probabilities, derived from the antonym sequencing task, reflect the ordering of antonyms within natural language. In line with the Pollyanna Hypothesis, we argue that markedness is closely related to valence; language users demonstrate a tendency to present words evaluated positively ahead of those evaluated negatively if given the choice. Future research should consider the relationship of markedness and valence, and the influence of contextual information in determining which member of an antonym pair is marked or unmarked within discourse

Contrasting prefrontal cortex contributions to episodic memory dysfunction in behavioural variant frontotemporal dementia and alzheimer's disease

Recent evidence has questioned the integrity of episodic memory in behavioural variant frontotemporal dementia (bvFTD), where recall performance is impaired to the same extent as in Alzheimer's disease (AD). While these deficits appear to be mediated by divergent patterns of brain atrophy, there is evidence to suggest that certain prefrontal regions are implicated across both patient groups. In this study we sought to further elucidate the dorsolateral (DLPFC) and ventromedial (VMPFC) prefrontal contributions to episodic memory impairment in bvFTD and AD. Performance on episodic memory tasks and neuropsychological measures typically tapping into either DLPFC or VMPFC functions was assessed in 22 bvFTD, 32 AD patients and 35 age- and education-matched controls. Behaviourally, patient groups did not differ on measures of episodic memory recall or DLPFC-mediated executive functions. BvFTD patients were significantly more impaired on measures of VMPFC-mediated executive functions. Composite measures of the recall, DLPFC and VMPFC task scores were covaried against the T1 MRI scans of all participants to identify regions of atrophy correlating with performance on these tasks. Imaging analysis showed that impaired recall performance is associated with divergent patterns of PFC atrophy in bvFTD and AD. Whereas in bvFTD, PFC atrophy covariates for recall encompassed both DLPFC and VMPFC regions, only the DLPFC was implicated in AD. Our results suggest that episodic memory deficits in bvFTD and AD are underpinned by divergent prefrontal mechanisms. Moreover, we argue that these differences are not adequately captured by existing neuropsychological measures

Binary systems and their nuclear explosions

Peer ReviewedPreprin

Structured Mentorship For New Employees: A Case Study

In The Southland Corporation’s Pacific Western Division new field representatives are assigned a “Sponsor”/Mentor. Intentions include the provision of a “neutral” person with whom to talk-over problems. To examine the nature of sponsor/sponsoree relationships and to evaluate participant benefits a study was conducted involving structure interviews with sponsors and sponsorees. Grouped responses, in some of the focused areas of the research, provided indices (of satisfaction with the relationship, for example). In addition, sponsoree perceptions of their sponsor’s adherence to the six prescribed behaviors of the Robert Carkhuff (1971) model for helping relationships were measured. The level of correlation between “Carkhuffian behavior”, by the sponsor, and sponsoree satisfaction was established, and participant suggestions were obtained. Sponsor and Sponsoree satisfaction with the program was found to be high, though sponsors are much more satisfied than sponsorees. The relationship between sponsor satisfaction and treatment in the Carkhuff recommendations was found to be moderately correlated

Surgical Interest and Surgical Match for Third-Year Students: Results of a Prospective Multivariate Longitudinal Cohort Study

Background: Numerous factors have been linked to surgical career choice, including the quality of third-year surgical clerkship. The vast majority of studies also selectively evaluate one or only a few variables that link to surgical career choice, so relative impact cannot be assessed. This study simultaneously evaluates the majority of variables linked to surgical career choice in previous research so that the relative contributions of each of these variables with respect to surgical career choice can be determined. Study Design: Surveys before, during, and after the third-year surgical clerkship included student demographics, background, and values (eg, importance of money, controllable lifestyle), and student reactions to the third-year surgical clerkship. The dependent variables in this study included interest in surgery at the beginning and end of the clerkship and matching into a surgical residency. Results: Both univariate and multivariate analyses generally supported findings in the literature, but the strengths of these associations reported previously might not have been accurate. In this study, the surgical resident match odds ratio for students starting the clerkship already knowing they wanted to be a surgeon was 22.46; the next highest associations were 4.65 and 3.37, which corresponded to earlier exposure to a surgical specialty and earlier exposure to general surgery, respectively. Differences in career choice for general surgeons and surgical specialists were also explored. Conclusions: Although the experience of the clerkship is related to career choice, the largest impact of the clerkship is for those already interested in a surgical career. Interest in a surgical career largely develops before the third-year clerkship. Implications of the results for recruiting greater numbers of students into surgical careers are discussed