Non-Gaussian contribution to the hydrodynamic radius at the θ point

Marshall Fixman; Marc L. Mansfield

doi:10.1021/ma00134a003

Non-Gaussian contribution to the hydrodynamic radius at the θ point

Macromolecules ◽

10.1021/ma00134a003 ◽

1984 ◽

Vol 17 (4) ◽

pp. 522-527 ◽

Cited By ~ 9

Author(s):

Marshall Fixman ◽

Marc L. Mansfield

Keyword(s):

Hydrodynamic Radius ◽

Non Gaussian ◽

Θ Point

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Temperature dependence of the hydrodynamic radius of flexible coils in solutions. 1. Vicinity of the θ point

Macromolecules ◽

10.1021/ma00236a019 ◽

1983 ◽

Vol 16 (2) ◽

pp. 253-261 ◽

Cited By ~ 14

Author(s):

Petar Vidakovic ◽

Francis Rondelez

Keyword(s):

Temperature Dependence ◽

Hydrodynamic Radius ◽

Θ Point ◽

Flexible Coils

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Monte Carlo calculation of the hydrodynamic radius at the θ point. Deviations from analytical Gaussian behavior

Macromolecules ◽

10.1021/ma00232a052 ◽

1982 ◽

Vol 15 (4) ◽

pp. 1205-1207 ◽

Cited By ~ 19

Author(s):

Charles M. Guttman ◽

Frank L. McCrackin ◽

Charles C. Han

Keyword(s):

Monte Carlo ◽

Hydrodynamic Radius ◽

Monte Carlo Calculation ◽

Θ Point

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The Effect of Alternative Scoring Procedures on the Measurement Properties of a Self-Administered Depression Scale

European Journal of Psychological Assessment ◽

10.1027/1015-5759/a000371 ◽

2019 ◽

Vol 35 (1) ◽

pp. 55-62 ◽

Cited By ~ 1

Author(s):

Noboru Iwata ◽

Akizumi Tsutsumi ◽

Takafumi Wakita ◽

Ryuichi Kumagai ◽

Hiroyuki Noguchi ◽

...

Keyword(s):

Classical Test Theory ◽

Depression Scale ◽

Psychometric Testing ◽

Epidemiologic Studies ◽

Test Theory ◽

Measurement Properties ◽

Irt Model ◽

Response Alternatives ◽

Polytomous Item Response ◽

Θ Point

Abstract. To investigate the effect of response alternatives/scoring procedures on the measurement properties of the Center for Epidemiologic Studies Depression Scale (CES-D) which has the four response alternatives, a polytomous item response theory (IRT) model was applied to the responses of 2,061 workers and university students (1,640 males, 421 females). Test information functions derived from the polytomous IRT analyses on the CES-D data with various scoring procedures indicated that: (1) the CES-D with its standard (0-1-2-3) scoring procedure should be useful for screening to detect subjects with “at high-risk” of depression if the θ point showing the highest information corresponds to the cut-off point, because of its extremely higher information; (2) the CES-D with the 0-1-1-2 scoring procedure could cover wider range of depressive severity, suggesting that this scoring procedure might be useful in cases where more exhaustive discrimination in symptomatology is of interest; and (3) the revised version of CES-D with replacing original positive items into negatively revised items outperformed the original version. These findings have never been demonstrated by the classical test theory analyses, and thus the utility of this kind of psychometric testing should be warranted to further investigation for the standard measures of psychological assessment.

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