last time i had promised to tell about the Intermittent Schedule. it is divided into two ; Ratio and Interval.
Ratio Schedule : when the reinforcer is given after a certain amount of response. it is divided into two ; Fixed Ratio and Variable Ratio
Fixed Ratio is when the amount of response is consistant with the reinforcer. for example every 4 pages you read a day, you will be rewarded with 10 marks, or every 10 pages you read you'll recieve a token or a gift.
Variable Ratio is when the amount of response is not fixed upon recieving the reinforcer. for example, today Safiyya finish up 3 ayat's for memorizing, tomorrow she'll memorize 5 pages only then she'll be rewarded, the day after tomorrow she did 7 pages but did not get any reward as yet on the 4th day she'll memorize 8 pgs then she'll be rewarded.
Fixed interval is the reinforcer is to response after each x minute. the reinforcer depends on the time that response took. for example, if you read the quran for every 30 minutes a day then you'll get a rest.
Variable Interval is when the time of responses are not fixed with the time, for example if Ali read the Quran ofr 10 mins then 15 mins then 8 mins then 6 mins, only then shall he be rewarded, let say with a game.
for further info, if you wish to see the results of these schedule :
http://www.behavioralinstitute.org/FreeDownloads/Behavior_Reinforcement/4IntermittentReinforceSchedules_06.pdf
wassalam