TY - JOUR
T1 - An Empirical Method for Determining an Appropriate Interval Length for Recording Behavior
AU - Sanson‐Fisher, R. W.
AU - Poole, A. Desmond
AU - Dunn, John
PY - 1980/1/1
Y1 - 1980/1/1
N2 - The study sought to examine the effects of varying interval length on the representation of data obtained using modified frequency time sampling. A 7‐category scale was used to observe reliably the behavior of eight psychiatric inpatients. Using electronic real time recording equipment, it was possible to computer analyze the obtained data at varying interval lengths, the shortest interval being 1.0 seconds. It was found that increasing the interval length had little effect on the percentage of total duration recorded within each behavioral category, suggesting that this is a relatively stable measure of behavior. Percentage total events for each category was less stable with increasing interval lengths. The number of recorded events within each category tended to decrease, while their average durations tended to increase, as a function of increasing the interval length. The data suggest that the current practice of determining interval length in an arbitrary fashion, or on the basis of convention, should be abandoned. Rather, such a decision should be empirically determined for each particular observation scale and subject group. One method by which this might be achieved is presented. 1980 Society for the Experimental Analysis of Behavior
AB - The study sought to examine the effects of varying interval length on the representation of data obtained using modified frequency time sampling. A 7‐category scale was used to observe reliably the behavior of eight psychiatric inpatients. Using electronic real time recording equipment, it was possible to computer analyze the obtained data at varying interval lengths, the shortest interval being 1.0 seconds. It was found that increasing the interval length had little effect on the percentage of total duration recorded within each behavioral category, suggesting that this is a relatively stable measure of behavior. Percentage total events for each category was less stable with increasing interval lengths. The number of recorded events within each category tended to decrease, while their average durations tended to increase, as a function of increasing the interval length. The data suggest that the current practice of determining interval length in an arbitrary fashion, or on the basis of convention, should be abandoned. Rather, such a decision should be empirically determined for each particular observation scale and subject group. One method by which this might be achieved is presented. 1980 Society for the Experimental Analysis of Behavior
KW - empirical method of determination
KW - interval length
KW - within‐interval error
UR - http://www.scopus.com/inward/record.url?scp=0019063634&partnerID=8YFLogxK
U2 - 10.1901/jaba.1980.13-493
DO - 10.1901/jaba.1980.13-493
M3 - Article
C2 - 7430008
AN - SCOPUS:0019063634
VL - 13
SP - 493
EP - 500
JO - Journal of Applied Behavior Analysis
JF - Journal of Applied Behavior Analysis
SN - 0021-8855
IS - 3
ER -