Construction and Validation of the 21 Item Fitness-to-Drive Screening Measure Short-Form

Abstract

Introduction: The Fitness-to-Drive Screening Measure is a free online screening tool that detects at-risk older drivers, however, it's 20 min administration time may render the 54-item tool less than optimal for clinical use. Thus, this study constructed and validated a 21-item FTDS Short-Form (FTDS-SF).Method: This mixed methods study used 200 proxy rater responses and older driver on-road assessments. We conducted a Rasch analysis to examine information at the level of the item and used content validity index scores to select items. Using a receiver operator characteristics curve we determined the concurrent validity of the FTDS-SF to on-road outcomes.Results: Twenty-one items were selected for the FTDS-SF. The area under the curve = 0.72, indicated the FTDS-SF predicted on-road outcomes with acceptable accuracy. Still, 68 drivers were misclassified.Conclusion: The FTDS-SF may reduce administration time, while still yielding acceptable psychometric properties. Yet, caution needs to be executed in clinical decision making as the measure is overly specific.

The Development of Instrument to Assess Physician’s Practice in the Management of Patients With Terminal Diseases

“…19,25 Infit is used to indicate unexpected patterns of response for person ability and outfit indicates the unexpected rater responses. 19,26 3. The Person-Item Map describes the respondent's ability to answer the question correctly.…”

“…19,25 Infit is used to indicate unexpected patterns of response for person ability and outfit indicates the unexpected rater responses. 19,26…”

“…This map illustrates the ability of respondents to be categorized from lowest to highest and the quality of items to be categorized from easy items to difficult items visually. 19,20,26…”

“Not as Safe as I Believed”: Differences in Perceived and Self-Reported Cycling Behavior between Riders and Non-Riders

“…To bridge this gap between the self-reported and actual observed behavior, proxy reports (i.e., using an external rater to assess a specific issue that needs to be addressed from a non-self-reported approach) are used in many fields such as healthcare [25][26][27] and social functioning [28]. In road safety research, proxies have been used to assess driving behaviors among older adults [18,[29][30][31], fitness to drive in stroke patients [32], or to compare the risk perception between drivers and other road users [23]. The term proxy report refers to the use of an external rater when a different perspective is needed for a full understanding of a particular construct, among other reasons [28], and thus both terms (external rater and proxy) will be interchangeably used throughout this paper.…”