Continue shopping “Justin B. Leaf, Ph.D. | Behavior Analysts Being Ethical on Social Media | 1 Hour” has been added to your cart. Shopping Cart Checkout details Order Complete Product Price Quantity Subtotal × Changing Preference from Tangible to Social Activities Through an Observation Procedure | Learning | 0.5 Hours $0.00 Changing Preference from Tangible to Social Activities Through an Observation Procedure | Learning | 0.5 Hours quantity $0.00 × Justin B. Leaf, Ph.D. | Behavior Analysts Being Ethical on Social Media | 1 Hour $0.00 1 $0.00 Cart totals Subtotal $0.00 Total $0.00 Proceed to checkout Coupon: