Ava is conducting an assessment to determine the functional…

Ava is conducting an assessment to determine the functional variable maintaining her client’s problem behavior. She decides to rapidly alternate the 4 test conditions and randomizes the order of presentation of each condition. What is the precise name of the design called? 

Christina wants to evaluate her client’s preference for NCR…

Christina wants to evaluate her client’s preference for NCR versus DRA as two potential interventions to treat her client’s attention maintained problem behavior. She pairs an arbitrary colored stimulus with each intervention and then asks the client to select a color which determines the intervention that the client receives. She measures the client’s color selections to determine preference. Which design is she most likely using?