BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: scored-interval IOA
Answer:
An interobserver agreement index based only on the intervals in which
either observer recorded the occurrence of the behavior; calculated by dividing the
number of
intervals in which the two observers agreed that the behavior occurred by the number
of
intervals in which either or both observers recorded the occurrence of the behavior
and
multiplying by 100.
Scored-interval IOA is recommended as a measure of agreement for behaviors that
occur at low
rates because it ignores the intervals in which agreement by chance is highly likely.
(Compare to
interval-by-interval IOA and unscored-interval IOA.)
,BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: total count IOA
Answer:
The simplest indicator of IOA for event recording data; based on comparing
the total count recorded by each observer per measurement period; calculated by
dividing the
smaller of the two observers'
counts by the larger count and multiplying by 100.
Q: total duration IOA
Answer:
A relevant index of IOA for total duration measurement; computed by
dividing the shorter of the two durations reported by the observers by the longer
duration and multiplying by 100.
,BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: trial-by-trial IOA
Answer:
An IOA index for discrete trial data based on comparing the observers'
counts (0 or 1) on a trial-by- trial, or item-by-item, basis; yields a more conservative
and
meaningful index of IOA for discrete trial data than does total count IOA.
, BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: unscored-interval IOA
Answer:
An interobserver agreement index based only on the intervals in
which either observer recorded the nonoccurrence of the behavior; calculated by
dividing the
number of intervals in which the two observers agreed that the behavior did not occur
by the
number of intervals in which either or both observers recorded the nonoccurrence of
the
behavior and multiplying by 100.
Unscored-interval IOA is recommended as a measure of agreement for behaviors that
occur at
high rates because it ignores the intervals in which agreement by chance is highly
likely.
(Compare to interval-by-interval IOA, scored-interval IOA.)
Update
Q: scored-interval IOA
Answer:
An interobserver agreement index based only on the intervals in which
either observer recorded the occurrence of the behavior; calculated by dividing the
number of
intervals in which the two observers agreed that the behavior occurred by the number
of
intervals in which either or both observers recorded the occurrence of the behavior
and
multiplying by 100.
Scored-interval IOA is recommended as a measure of agreement for behaviors that
occur at low
rates because it ignores the intervals in which agreement by chance is highly likely.
(Compare to
interval-by-interval IOA and unscored-interval IOA.)
,BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: total count IOA
Answer:
The simplest indicator of IOA for event recording data; based on comparing
the total count recorded by each observer per measurement period; calculated by
dividing the
smaller of the two observers'
counts by the larger count and multiplying by 100.
Q: total duration IOA
Answer:
A relevant index of IOA for total duration measurement; computed by
dividing the shorter of the two durations reported by the observers by the longer
duration and multiplying by 100.
,BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: trial-by-trial IOA
Answer:
An IOA index for discrete trial data based on comparing the observers'
counts (0 or 1) on a trial-by- trial, or item-by-item, basis; yields a more conservative
and
meaningful index of IOA for discrete trial data than does total count IOA.
, BCBA Questions and Answers with Verified Solutions | Latest 2026
Update
Q: unscored-interval IOA
Answer:
An interobserver agreement index based only on the intervals in
which either observer recorded the nonoccurrence of the behavior; calculated by
dividing the
number of intervals in which the two observers agreed that the behavior did not occur
by the
number of intervals in which either or both observers recorded the nonoccurrence of
the
behavior and multiplying by 100.
Unscored-interval IOA is recommended as a measure of agreement for behaviors that
occur at
high rates because it ignores the intervals in which agreement by chance is highly
likely.
(Compare to interval-by-interval IOA, scored-interval IOA.)
