Measuring Tactical Innovation in Terrorist Attacks

Terrorism provides a unique context for examining innovation, as the generation of novel, effective, and complex ideas are essential for survival in destructive and malevolent groups. Despite this, innovation remains an underdeveloped concept in terrorism research, at least from the creativity scholars. One reason for this is the limited empirical data about this phenomenon, making it unclear which tenets of creativity research hold versus which do not translate in the domain of terrorism. This two-part study explores this rich domain by examining the dimensions of innovation in a robust sample of terrorist attacks. Findings indicated that three dimensions of innovation (i.e., novelty, relevance, and elegance) emerged from the attack data and that these dimensions were related to different attack characteristics. This article expands our understanding of terrorist innovation by drawing from established theory and methods from creativity research and highlights their manifestations in this understudied domain.     

Semantic priming of familiar faces

A series of experiments to explore the effect of priming by semantically related items in familiarity judgement tasks using faces and names that are analogous to lexical decision tasks is reported. In the first experiment, the semantic priming effect in face recognition reported by Bruce (1983) was explored in more detail by including neutral as well as associated and unrelated primes and by varying the prime-target SOA from 250 to 1,000 msec. Significant facilitation effects, with no inhibition, were found at all three SOAs. To explore the analogy between the processing of faces and verbal materials, a second experiment used names rather than faces. The difference between related and unrelated conditions at 250- and 1,000-msec SOA was similar to that found for faces in Experiment 1, but for names there was some evidence of inhibition. To investigate the locus of the priming effect with faces, in Experiment 3 the effect of degrading face targets was examined. An interaction between stimulus quality and semantic priming was observed, suggesting that the locus of the facilitation might lie at a relatively early stage in face processing. The results of these experiments illustrate further similarities between the processing of faces and verbal materials (cf. Bruce 1979, 1981).     

Calibration of computer-monitored running wheels with adjustable drag

The design of a rodent running wheel with adjustable drag and ability to measure accurately the direction as well as the speed of running is described. A computer program in the C language enables a single microcomputer to monitor several wheels simultaneously. Drag is conveniently calibrated by the rate of deceleration from 1 revolution per second when no animal is present, and the calibration procedure can also assess the smoothness of the drag mechanism. Results of tests of the setability, repeatablility, and durability of the drag are presented. A method is outlined to determine the physical work required to accelerate the wheel and to maintain its rotation against the frictional drag.