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Punched paper tape readers, frequently used for machine control and computer input, are readily adaptable for the purposes of presenting extremely complex signal sequences such as those used in psychophysiology. A description of basic operating principles is given together with an explanation of the minor modifications necessary to adapt this instrument to signal control. Complete schematics are presented of an instrument with seven channel control capacity. [ABSTRACT FROM AUTHOR]

The circuit described represents a relatively simple and economical solution to the problem of presenting to the human S his heart rate data in the form of an auditory signal. The requirements of portability, low cost, and long-term unattended operation have been met. In addition, portions of the circuit have additional uses in the general area of psychophysiological instrumentation. [ABSTRACT FROM AUTHOR]