Generating variable and random schedules of reinforcement using Microsoft Excel macros.

Matson et al. (2008) wrote six Excel macros that spit out reinforcement times. You pick VR, VI, VT, RR, RI, or RT. The sheet fills itself with numbers you can paste into any program.

No math by hand. No dice rolls. Just open the file, choose how many times you need, and copy the column.

The macros work. They give the right mix of short and long waits for each schedule type. You get the same spread the textbooks say you should.

Long (1963) first worked out the math for random-interval schedules. The 2008 macros turn that old paper into one-click numbers.

Meuret et al. (2001) showed VT and FT noncontingent reinforcement cut behavior the same. Jones et al. (2025) later found VT beats FT when staff miss deliveries. Both teams could use these macros to build their VT lists fast.

Kelley et al. (2023) thinned NCR quickly with signaled multiple schedules. Their method still needs RI or RT values; the macros make them in seconds.

Stop wasting minutes rolling dice or typing fake times. Download the free file, pick your schedule, and paste the column into your data sheet. You get clean, correct timings for any VR, VI, VT, RR, RI, or RT study you run next week.