The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electro-and photo-induced reactions at very high luminosity and good momentum and angular resolution for at least one of the reaction products. The central components of Hall A are two identical high resolution spectrometers, which allow the vertical drift chambers in the focal plane to provide a momentum resolution of better than 2 x 10(-4). A variety of Cherenkov counters, scintillators and lead-glass calorimeters provide excellent particle identification. The facility has been operated successfully at a luminosity well in excess of 10(38) CM-2 s(-1). The research program is aimed at a variety of subjects, including nucleon structure functions, nucleon form factors and properties of the nuclear medium. (C) 2003 Elsevier B.V. All rights reserved

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Two distinct deficits in research on male gender role conflict are addressed: (a) lack of psychometric information and (b) lack of research involving clinical samples. First, using 1,043 men across three samples, the psychometric properties of the Gender Role Conflict Scale (GRCS) were examined through confirmatory factor analyses, internal consistency estimation, and construct validation. Next, using 130 male university counseling center clients across two samples, the relation between gender role conflict and psychological distress was examined. The GRCS demonstrated good internal consistency and was best modeled as 4 intercorrelated factors, as originally proposed by J. M. O'Neil, B. Helms, R. Gable, L. David, and L. Wrightsman (1986). Construct validity was supported through correlations with attitudes about masculinity, fear of intimacy, and social desirability in expected directions. However, reservations about the Conflicts Between Work and Family Relations subscale are noted. Male gender role conflict was significantly related to psychological distress, with the Restrictive Emotionality subscale being the best predictor of distress level. Implications for mental health practice and future research are discussed.Gender role conflict occurs when rigid, sexist, or restrictive gender roles, learned during socialization, result in the personal restriction, devaluation, or violation of others or self (Mintz & O'Neil, 1990;O'Neil, 1990; O'Neil, Good, & Holmes, in press). In a recent review, Thompson, Pleck, and Ferrera (1992) concluded that the construct of male gender role conflict "provides an important link between societal norms scripting traditional masculinities and individuals' adaptation" (p. 598) and that instruments assessing this construct allow better prediction of men's actual behaviors than do other masculinity measures. The Gender Role Conflict Scale (GRCS; O'Neil et al., 1986, in press) is such an instrument, in that it was specifically designed to measure men's patterns of gender role conflict. In the Annual Review of Psychology, Betz and Fitzgerald (1993) observed that "the GRCS has proven itself to be a heuristic and fruitful contribution to the empirical literature on the male gender role" (p. 360) and that "the GRCS is by far the most well

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This is the first study to examine the relations between components of masculine gender role conflict and specific symptoms of psychological distress in a sample of men seeking counseling services. One hundred and thirty male clients from 2 university counseling centers completed the Gender Role Conflict Scale and the Symptom Checklist-90-Revised. Participants reported moderate to high levels of psychological symptoms, which were correlated with components of masculine role conflict. Results of simultaneous multiple regressions supported previous findings in nonclinical samples of relations between masculine role conflict and depression and interpersonal issues. In addition, masculine role conflict significantly predicted paranoia, psychoticism, and obsessive compulsivity. Implications for counseling and future research are discussed.