PSI Cosmetology Practice Exam

When performing a strand test, what is being assessed?

1. Hair length

2. Hair elasticity

3. Hair thickness

4. Hair color

The correct answer is: Hair elasticity

When performing a strand test, hair elasticity is being assessed to determine the hair's strength and its ability to stretch and return to its original length without breaking. This is particularly important in chemical services such as perming or coloring, where the integrity of the hair can be compromised. Assessing hair elasticity helps professionals understand how much manipulation the hair can withstand and whether it is suitable for certain treatments. Healthy hair typically exhibits good elasticity, allowing it to stretch significantly without damage. If the hair has low elasticity, it may break or become damaged during chemical processes. The other options, while relevant to hairstyling and treatments, do not reflect the primary focus of a strand test. Hair length and thickness provide valuable information but are not directly tested in this scenario. Hair color can influence results and choices in coloring, but it isn't the main concern of a strand test. Therefore, the emphasis on hair elasticity is fundamental to ensuring the safety and effectiveness of treatments applied.