The article by Fisher et al. (2018) applied the Behavioral Momentum Theory to reduce the resurgence of destructive behaviours. According to this theoretical approach, behaviours which have been strongly reinforced in the past are more resistant to extinction. The Behaviour Reduction Plan should involve conditions that reinforce appropriate behaviour to reduce the occurrence of destructive or unwanted behaviour. There are key components of this Behavioral Momentum Theory such as: Functional Assessment to identify the destructive behaviours in terms of antecedents, consequences, and maintaining variables Reinforcement of desirable behaviours to replace the destructive behaviours as the former serves the same functions. The reinforcement would be consistent to build their momentum and increase their occurrence. High-Proximity Reinforcement means that desired behaviour would be reinforced in close proximity to the occurrence of the destructive behaviour. Variable Schedules of Reinforcement would be used to build the momentum of the reinforcement Gradual reduction of reinforcement in terms of frequency and intensity over time. This ensures that the desired behaviour is resistant is extinction and perseveres even in the absence of reinforcement. Detailed explanation: 1. In the given case, the destructive behaviour is picking the nose which needs to be replaced with the desired behaviour of using a tissue. The functional assessment was conducted to understand the function of nose picking such as attention, curiosity, interest, stimulation, etc. The desired behaviour of using a tissue would be reinforced that serves the same functions. Sarah would be offered the tissue every time they are about to pick their nose. However, they would not be offered the tissue every time to build momentum. 2. In this case, Sarah playing with food is destructive behaviour and it needs to be replaced with using a tissue to clean up if there is a mess when eating. The functional was conducted to understand the function of messing with food such as attention, curiosity, interest, stimulation, etc. The desired behaviour of using a tissue would be reinforced that serves the same functions. Sarah would be offered the tissue every time they are about to play with the food. However, they would not be offered the tissue every time to build momentum. 3. The behaviour of licking palms is destructive behaviour and the desired behaviour is not licking her palm. The functional assessment was conducted to understand the function of palm licking such as attention, curiosity, interest, stimulation, etc. The desired behaviour of not licking the palm would be reinforced through praise and a smile. However, the reinforcement would not be offered every time but only some the time to discourage the palm licking behaviours.