Perceptual = relating to the ability to interpret or become aware of something through senses.

• A patient with perceptual problems.
• Perceptual skills are particularly important in sports.

Perceptive = Having or showing an unusually good ability to notice and understand.

• A perceptive woman.
• perceptive comments.
• He is so perceptive when it comes to other people’s feelings.

Perceptible = Noticeable, perceivable.

• Perceptible improvement in working standards.
• A perceptible decline in public confidence.
• A perceptible change in his behaviour.