Action-selection perseveration in young children: Advances of a dynamic model.

This study presents an empirical test and dynamic model of perseverative limb selection in children of 14-, 24-, and 36-months old (N = 66 in total). In the experiment, children repeatedly grasped a spoon with a single hand. In two separate conditions, the spoon was presented either four times on their right side or four times on their left side.

The significance of event information for 6- to 16-month-old infants' perception of containment.

Four experiments familiarized 6-, 9-, 12-, and 16-month-old infants to a solid block that was repeatedly lowered into a semitransparent container. In test trials the end state, containment, was either compatible or incompatible with the objects' size and position. In Experiment 1, infants saw the block and box successively before they observed the end state.

Young children's use of a visual aid: an experimental study of the effectiveness of training.

We report an experiment concerning the use of a stand magnifier by young children with visual impairments (21 males, 12 females; mean age 4y 8mo [SD 11mo]). Children had a normative developmental level and a visual acuity of 0.4 or less (< or =20/50 in Snellen's notation).

Occluding the trajectory of an object: effects on predicting containment with 9-, 12- and 16-month-olds.

Infants of 9-16-month-old repeatedly saw a block that was lowered into the opening of a container. It was found that the more time infants have to see the block relative to the container the easier they detect that the object relation specifies containment.

Action planning in young children's tool use.

Tool use consists of at least two coupled phases of activities, involving multi-step problem solving. It therefore provides an interesting window on the development of planning in goal-directed behavior. This study investigated 2-year-olds' and 3-year-olds' hand use in picking up and subsequently using a tool for displacing a target-object towards a specified goal location.

The planning of tool-to-object relations in young children.

This study investigated the way young children used a cane for displacing an object. In the experiment, 11 children with an average age of 32.3 months were asked to pick up a cane (hooked stick) that was located and orientated differently on each trial.

Variations of tool and task characteristics reveal that tool-use postures are anticipated.

The authors examined anticipation in tool use, focusing on tool length and tool-use posture. Adults (9 women and 9 men in each experiment) held a rod (length 0.4-0.

Geometrics and dynamics of a rod determine how it is used for reaching.

Displacing an object with a hand-held rod provided a simple paradigm for studying tool use. The authors asked how reaching was affected by manipulations of rod properties. Adults held a rod (length =.