Samenvatting
This note analyses several recent experimental and theoretical reports on vigilance that use the theory of signal dectectability. The psychological interpretation of the TSD measure of criterion, b, as an index of conservative ness during a vigil does not appear to pooling observations made under different conditions of attentiveness during a long vigil. The basic problems of vigilance research remain: to determine the conditions that affect attentive ness in signal detection tasks.