conspecnificance

What Is Conspecnificance?

Conspecnificance (from Latin con- meaning "together" and specificus meaning "particular") is a technical term used in some polygraph scoring contexts to refer to the concurrent significance of responses across multiple physiological channels. A response is conspecnificant when it appears as a meaningful, scoreable reaction simultaneously in two or more channels — for example, a concurrent increase in skin conductance, a respiratory suppression, and a blood pressure rise — all at the same question location.

Diagnostic Value

The presence of conspecnificant responses across channels strengthens the diagnostic significance of a physiological reaction. A response that appears in only one channel might represent a channel-specific artefact or a non-specific fluctuation. A response that appears simultaneously across multiple independent channels is much more likely to represent a genuine autonomic response to the test stimulus, because each channel measures a different aspect of the autonomic nervous system's activation.

Relationship to Scoring

In numerical scoring systems like the 7-position scale, each channel is scored independently at each analysis spot, and the channel scores are summed to produce the total. When a response is conspecnificant, all contributing channels receive non-zero scores in the same direction, producing a larger total that more definitively moves the cumulative score toward a DI or NDI classification. Responses that are strong in one channel but absent in others contribute less to the total.

Multi-Channel Confirmation

The concept of conspecnificance reflects the fundamental advantage of multi-channel recording in polygraph testing. The three core channels — electrodermal, respiratory, and cardiovascular — each provide independent physiological evidence. The convergence of evidence across channels increases confidence in the finding, while divergence (responses in some channels but not others) provides a more nuanced picture that may contribute to an inconclusive result when the overall evidence is insufficient to support a definitive classification.