INTRODUCTION: There is an obvious need for efficient measurement of neuropsychiatric phenomena. A proven method-computerized adaptive testing (CAT)-is not feasible for all tests, necessitating alternatives for increasing test efficiency. METHODS: We combined/compared two methods for abbreviating rapid tests using two tests unamenable to CAT (a Continuous Performance Test [CPT] and n-back test [NBACK]). N=9,498 (mean age 14.2 years; 52% female) were administered the tests, and abbreviation was accomplished using methods answering two questions: what happens to measurement error as items are removed, and what happens to correlations with validity criteria as items are removed. The first was investigated using quasi-CAT simulation, while the second was investigated using bootstrapped confidence intervals around full-form-short-form comparisons. RESULTS: Results for the two methods overlapped, suggesting that the CPT could be abbreviated to 57% of original and NBACK could be abbreviated to 87% of original with the max-acceptable loss of precision and min-acceptable relationships with validity criteria. CONCLUSIONS: This method combination shows promise for use in other test types, and the divergent results for the CPT/NBACK demonstrate the methods' abilities to detect when a test should not be shortened. The methods should be used in combination because they emphasize complementary measurement qualities: precision/validity..
INTRODUCTION: There is an obvious need for efficient measurement of neuropsychiatric phenomena. A proven method-computerized adaptive testing (CAT)-is not feasible for all tests, necessitating alternatives for increasing test efficiency. METHODS: We combined/compared two methods for abbreviating rapid tests using two tests unamenable to CAT (a Continuous Performance Test [CPT] and n-back test [NBACK]). N=9,498 (mean age 14.2 years; 52% female) were administered the tests, and abbreviation was accomplished using methods answering two questions: what happens to measurement error as items are removed, and what happens to correlations with validity criteria as items are removed. The first was investigated using quasi-CAT simulation, while the second was investigated using bootstrapped confidence intervals around full-form-short-form comparisons. RESULTS: Results for the two methods overlapped, suggesting that the CPT could be abbreviated to 57% of original and NBACK could be abbreviated to 87% of original with the max-acceptable loss of precision and min-acceptable relationships with validity criteria. CONCLUSIONS: This method combination shows promise for use in other test types, and the divergent results for the CPT/NBACK demonstrate the methods' abilities to detect when a test should not be shortened. The methods should be used in combination because they emphasize complementary measurement qualities: precision/validity..
Authors: Theodore D Satterthwaite; Mark A Elliott; Kosha Ruparel; James Loughead; Karthik Prabhakaran; Monica E Calkins; Ryan Hopson; Chad Jackson; Jack Keefe; Marisa Riley; Frank D Mentch; Patrick Sleiman; Ragini Verma; Christos Davatzikos; Hakon Hakonarson; Ruben C Gur; Raquel E Gur Journal: Neuroimage Date: 2013-08-03 Impact factor: 6.556
Authors: J Daniel Ragland; Bruce I Turetsky; Ruben C Gur; Faith Gunning-Dixon; Travis Turner; Lee Schroeder; Robin Chan; Raquel E Gur Journal: Neuropsychology Date: 2002-07 Impact factor: 3.295
Authors: David R Roalf; Tyler M Moore; David A Wolk; Steven E Arnold; Dawn Mechanic-Hamilton; Jacqueline Rick; Sushila Kabadi; Kosha Ruparel; Alice S Chen-Plotkin; Lama M Chahine; Nabila A Dahodwala; John E Duda; Daniel A Weintraub; Paul J Moberg Journal: J Neurol Neurosurg Psychiatry Date: 2016-04-12 Impact factor: 10.154
Authors: T M Moore; I K Martin; O M Gur; C T Jackson; J C Scott; M E Calkins; K Ruparel; A M Port; I Nivar; H D Krinsky; R E Gur; R C Gur Journal: Psychol Med Date: 2015-10-23 Impact factor: 7.723