+ wishlist The Intentionality Model and Language Acquisition: Engagement, Effort and the Essential Tension in Development (Monographs of the Society for Research in Child Development) [9781405100892] Add to Cart The item has been added Author: Lois Bloom Erin Tinker The Intentionality Model and Language Acquisition: Engagement, Effort and the Essential Tension in Development (Monographs of the Society for Research in Child Development) [9781405100892] Buy More - Save More. Below are the available bulk discount rates for each individual item when you purchase a certain amount Quantity Price Savings 25 - 49 4% 50 - 99 5% 100+ 6% List Price As Low as $61.95 Format: Paperback