IOA calculation

total count IOA: (smaller count/Larger count) x 100= IOA%

Mean Count -per-Interval IOA" s: (IOA Int#1+IOAInt#2+ IOAINT#N. =. IOA%

N Intervals

Exact Count -per-Interval IOAs: = (Number of Intervals of 100% IOA) x 100= IOA%

N Intervals

Total Duration IOAs: Shorter Duration. X 100. =. IOA%

Longer Duration

Mean Duration -per-occurrence IOAs: R1IOA+R2IOA+R3IOA). x 100. =. IOA%

N Responses

Trial by Trial. IOAS:(Number of Trials Agreement). x100. =. IOA%

Total Number of Trials.

Interval -by-Interval IOA's =. # of Intervals Agreed. x 100=. IOA%

Total Number of Intervals

• Scored Interval IOA: Only those intervals which either or both observers recorded an occurrence (+) of the behavior are used to calculate IOA

• Unscored Interval IOA: Only those intervals in which either or both recorded a non-occurrence (-)of the behavior are used to calculate IOA

Use the IOA calculation formulas to solve these questions

Question 1

What is the total count IOA : observer 1: 9 responses in 1hr

Observer 2:10. responses in 1hour

Question 2

Calculate the mean count per interval

observer 1= Interval1=3 , Interval 2= 0, interval =6

Observer2= Int1= 4, Int2= 4, Int 3= 10, Interval4= 6

Question 3

Mean Count Per Interval

Observer1: Int1= 6, int 2= 2, Int 3= 8 , Int 4= 3

Observer2: Int1= 6, Int 2= 4, Int3= 10, Int 4= 2

Question4

Exact Count per Interval

Observer1: int1=. 6, Int 2=. 5, Int 3= 88, Int 4= 2

Observer2: Int 1= 6, Int2= 5, Int 3= 89, Int 4= 2

Question5

Exact Count Per Interval

Observer1: Int1= 2, Int2= 0, Int 3= 5, Int 4= 6

Observer2: Int1= 8, Int2= 4, Int3=10, Int4= 6

Question6

Calculate Total Duration per occurrence

Occurrence 1 2. 3. 4

Observer1 1sec. 40sec. 22sec. 0 sec

Observer 2. 2sec. 30sec. 22sec. 3sec

Question7

Mean Duration per occurrence

Occurrence. 1. 2. 3. 4

Observer1: 1sec. 40sec. 22sc. 0 sec

Observer 2: 2sec. 30sec 22sec. 3 sec

Question 8

Interval by interval

Interval 1. 2. 3. 4

Obs 1. +. - +. -

Obs 2. +. +. +. -

Question 9

Interval by Interval

Interval 1. 2. 3. 4. 5

Obs1. - - + +. +

Obs2. +. +. - - +

Question 10. Calculate Interval by Interval

Interval 1. 2. 3. 4. 5

Obs1 +. - - - +

Obs2. - - +. - +

Question11. Scored Interval

Interval 1. 2. 3. 4. 5

Obs.1. - - +. - +

Obs2. +. - +. - +

Question 12. Scored Interval

Interval. 1. 2. 3. 4. 5

Obs1 : - - +. - +

Obs2: +. +. - - +

Question 13. Scored interval

Interval 1. 2. 3. 4. 5

Obs1. - - - - +

Obs2. - - +. - +

Question 14. Unscored Interval

Interval 1. 2. 3. 4. 5

Obs 1. +. +. - - +

Obs 2. +. +. - - +

Question 15. Unscored Interval

Interval 1. 2. 3. 4. 5

Obs 1. +. - +. +. +

Obs 2. +. +. +. +. +

Question 16. Unscored Interval

Interval 1. 2. 3. 4. 5

Obs1. +. - - - +

Obs.2. - - +. - +