Trivial Head Research Articles

The trivial intersection problem for characters of principal indecomposable modules

For a prime p and a finite group G let Φ p ( G ) denote the complex character associated to the projective indecomposable module in characteristic p with trivial head. Let Irr ( Φ p ( G ) ) denote the set of irreducible characters occurring as constituents in Φ p ( G ) . We characterize all finite simple groups which satisfy Irr ( Φ p ( G ) ) ∩ Irr ( Φ q ( G ) ) = { 1 G } for all primes p ≠ q .

Validation of the Computerized Assessment of Response Bias in Litigating Patients with Head Injuries

The detection of malingering in neuropsychological assessment requires valid measures of incomplete effort. The Computerized Assessment of Response Bias (CARB) is a digit-recognition procedure desiged to detect poor effort during a neuropsychological evaluation. We examined the CARB performance of a consecutive series of litigating patients (N = 119) with a full range of head-injury severity, from trivial to severe. Patients with trivial or mild head injuries performed more poorly than did patients with frank brain injuries. Specifically, patients with moderate to severe traumatic brain injuries obtained higher total scores and demonstrated briefer response latencies than did patients with trivial or mild head injuries.