Final answer:
After choosing a target behavior, the next step in the behavior modification process is assessment, which includes gathering data and understanding the behavior to inform an effective intervention strategy.
Step-by-step explanation:
Once a target behavior has been chosen, the next step in the behavior modification process is typically assessment. The purpose of the assessment phase is to understand the current state of the behavior, and inform the development of an effective intervention strategy. This involves gathering data to create a baseline, identifying triggers and consequences of the behavior, and other relevant factors that could influence the modification plan. After a comprehensive assessment, other steps follow, such as goal setting which involves defining clear, measurable, achievable, and relevant objectives. The process continues with further steps like implementation and observation to monitor progress and make necessary adjustments to the behavior change plan.