ABSTRACT
Three experiments were conducted to test participants' ability to detect targets in colored spatial displays using 7-level bipolar scales. Experiment 1 assessed the ability of participants to detect high or low targets using 12 scales whose poles either were directly opposed in color space or had a primary and an intermediate hue at each pole. Experiment 2 used 8 scales whose arms were orthogonal in color space. Experiment 3 examined the simultaneous detection of high and low targets. Although there are notable exceptions, scales that are close to or above the horizontal (red-green) axis in color space perform best. Of the scales with orthogonal arms, those that are oriented downward, toward the blues, in color space are least satisfactory. Scales that are asymmetrically effective are common, and applications requiring good detectability at both extremes must take this into account. The results are discussed in the context of the evolution of trichromatic color vision.
Subject(s)
Attention , Color Perception , Orientation , Pattern Recognition, Visual , Science , Adult , Biological Evolution , Female , Humans , Male , Psychophysics , Reaction Time , Students/psychologyABSTRACT
Hand therapists often recognize that their patients are experiencing psychosocial distress following traumatic hand injury but may lack the time and training to determine whether referral for psychological assessment and treatment is warranted. The Injured Workers Survey (IWS) is a brief, effective self-report tool that screens for psychosocial distress, in particular for characteristic symptoms of post-traumatic stress disorder (PTSD). It also collects clinically relevant information about other psychosocial issues that have a major effect on treatment outcomes. A recent research study has validated the IWS as a screen for PTSD and supports its routine use in the initial assessment of all patients with traumatic hand injuries. To the extent that psychosocial distress interferes with recovery, its early identification and treatment can optimize overall treatment outcomes and facilitate successful in return to work.
