AUDIO TAPE STORAGE OF EXPERIMENTAL DATA - AN APPLICATION TO TACHISTOSCOPIC RESEARCH WITH CHILDREN

An inexpensive portable system is described for storing digital data on audio tape for later computer processing. The technique involves the use of integrated circuits and an ordinary stereo tape recorder. Each datum is converted to a binary-coded voltage level that, through a sampling device, controls the phase of a square-wave signal. Depending on whether the bit being coded is ld0rd or ld1,rd the signal recorded on one tape track is either in phase or 180 deg out of phase with a reference signal recorded on the other track. Later, the recorded tape may be played back into a computer for data analysis. An application of this technique for tachistoscopic research is described. © 1969 Psychonomic Society, Inc.