Complex sentence: The Strong Interest Inventory (SII) is an interest inventory used in career assessmensment is to give insight into a person's interests, so that they may have less difficulty in deciding on an appropriate career choice for themselves.
Split into simpler sentences: The Strong Interest Inventory (SII) is an interest inventory used in career assessment. The goal of this assessment is to give insight into a person's interests, so that they may have less difficulty in deciding on an appropriate career choice for themselves.