CHAPTER 20 Perceptual–Motor Development Barry W. Lavay and Joseph P. Winnick Chapter 20 Perceptual–Motor Development Chapter Outline • Overview of the perceptual–motor process • Understanding sensory systems Perceptual–Motor Development All movement activities are perceptual–motor experiences. This process allows individuals to provide meaning to sensory information and formulate appropriate motor responses. It involves a number of operational procedures: • Receive • Transmit • Organize • Integrate • Attach Perceptual–Motor Ability Deficits Occurs among many individuals with various disabilities and might include • poor spatial orientation, • difficulty with body awareness, • immature body image, • clumsiness or awkwardness, • coordination deficits, and • poor balance. What Does the Research Say? • 1960s and early 1970s: PM programs were strongly advocated and believed to be a significant improvement in academic and intellectual abilities. • Research has not supported this notion (Gallahue & Ozmun, 2006; Kavale & Mattison, 1983; Payne & Issacs, 2007). • However, research indicates clearly that PM abilities might be attained through carefully sequenced programs (Cheatum & Hammond, 2000; Sherrill, 2004; Winnick, 1979). • PM training is fundamental to many motor, academic, and functional (ADL) skills. Simplified Model of the Perceptual–Motor Process Perceptual–Motor Defined • Perception: The monitoring and interpretation of sensory information resulting from the interaction between sensory and CNS processes occurring at the cognitive level (brain) that enables the individual to derive meaning from information • Motor: The actual movement response or act • Summary: Everything we do is perceptual– motor! Hitting a Softball: Example of a PM Skill • Input: Includes ball speed, direction, spin, and other flight characteristics. • Integration: Information is transmitted to the CNS, where it is perceived as a ball to be hit. • Output: Initiate the appropriate response— swing and hit the ball. • Feedback: If the pitch was missed, adjustments to the swing are necessary in future situations. Sensorimotor Activity • Occurs at a subcortical level and does not involve meaning, interpretation, or corticallevel functioning. • Motor responses to sensory input. • Sensory integration results in perception and other types of sensory data syntheses. • Reflexes and postural reactions. Ecological Approach • Perception is specific to each individual. • The environment is perceived directly in terms of its utility for the perceiver (Gibson, 1977, 1979). • Individuals perceive the environment in terms of the actions they can exert on it—that is, the affordances provided by the environment. • Example: Children might perceive a chair to crawl under, whereas adults perceive it as an object to sit on (Burton, 1990; Davis & Broadhead, 2007; Davis & Burton, 1991). Perceptual–Motor Deficits or Breakdowns • Input: Cannot adequately take in visual or auditory information from the environment; thus information does not appropriately reach the CNS (e.g., deafness, blindness). • Integration: Impairs the functioning of the CNS and the relevant information received and the ability to process sensory input (e.g., LD, ADHD, lack of motor planning). (continued) Perceptual–Motor Deficits or Breakdowns (continued) • Output: Inappropriate functioning during previous steps as well as conditions that influence the transmission of information and movement (e.g., CP, SPI lack of tactual and vestibular perception). • Feedback: Unable to modify or correct behavior (e.g., faulty kinesthetic perception). Analysis of Prominent Perceptual–Motor Need and Deficit Areas Facilitating and Nurturing Perceptual–Motor Development Preschoolers and young children (2 to 7 years) • Movement exploration • Guided discovery • Open-ended tasks with more than one way to respond Teaching Purposeful Perceptual–Motor Skills 1. Purposeful movement that is motivating and performed in natural settings (e.g., kicking the ball into a goal in a soccer lead-up activity or game) 2. Affordances in the environment to make perceptual judgments and to assess the accuracy of the judgments (e.g., “Can I pass the ball to a teammate without it being intercepted by a defensive player?”) (Burton, 1987) Sensory Systems The sensory systems work collectively and simultaneously to provide the individual with the following information: • Tactile • Proprioceptive (kinesthetic) • Visual • Auditory Promote the multisensory approach. Tactile Perception • Ability to interpret sensations from the various layers of the skin surfaces of the body • Externally related and responds to touch, feel, and manipulation • Example: distinguishing wet and dry, hot and cold, soft and hard, rough and smooth (continued) Tactile Perception (continued) Disorganized tactile system • Tactile defensive: sensitivity to normal touch that causes a negative or painful reaction • Tactile deprived: have not received necessary amounts of stimulation and crave touch, seeking physical contact (i.e., weighted vest) Proprioception Sensory stimuli from skin, muscles, tendons, joints, and vestibular sense receptors that are in the categories of kinesthetic perception: 1. Body awareness 2. Laterality and verticality 3. Balance Kinesthetic Perception • The awareness and memory of movement and position • Internally related; develops from impulses that originate from the body’s proprioceptors (i.e. , muscles, tendons, joints) • The ability to know a movement, body position, or action before executing it • Feel the correctness of a movement • Basic to all movement and associated with visual– motor and auditory–motor abilities Body Awareness Allows people to derive meaning from their body and includes the following: • Body schema: where the body ends and external space begins • Body image: feelings one has about one’s body • Body concept: knowledge one has about one’s body Visual Perceptual–Motor Development Ability to see, fixate, and track; includes • visual figure–ground perception, • spatial relations, • visual constancy, and • visual–motor coordination. Visual Figure–Ground Perception • Distinguish the main figure or target from its background. • Differentiate and integrate parts of objects to form meaningful wholes. • Shift attention and ignore irrelevant stimuli. • Examples: picking out a specific letter of the alphabet from a field of extraneous items; tracking moving objects, such as a ball to be hit; observing lines, boundaries, diagrams, or footprints. Spatial Relationships • Locate objects in space relative to oneself or self-space (egocentric localization). • Example: direction, distance, and depth. • Locate objects relative to one another or general space (objective localization). • Example: position on a court. Visual Perceptual–Motor Constancy • Recognize objects despite variations in their presentation. • Recognize the sameness of an object that might vary in appearance, size, color, texture, brightness, or shape. • Example: a football spiraling in the air. Visual–Motor Coordination • Ability to coordinate vision with body movements • Combination of visual with tactile and kinesthetic perception (not exclusively visual ability) • Eye–limb coordination (eye–hand, eye–foot) • Examples: – Classroom—cutting, pasting, finger painting, drawing, tracing – Physical education—throwing, catching, kicking, striking Auditory Perceptual–Motor Development Built on auditory acuity and perception and includes • auditory figure–ground perception, • sound localization and discrimination, and • temporal auditory perception. Auditory Figure–Ground Perception • Distinguish and attend to relevant auditory stimuli against a background of general auditory stimuli. • Ignore irrelevant stimuli (noisy gymnasium) and attend to relevant stimuli (teacher directions). • Example: determining a teacher signal in order to transition. Auditory Discrimination • Recognize an auditory stimulus as the same under varying presentations. • Recognize and discriminate among variations of auditory stimuli presented in a temporal series, as well as auditory perceptual constancy. • Examples: distinguishing frequencies, qualities, and amplitudes of sound; distinguishing pitch, loudness, and constancy of auditory stimuli. Sound Localization • Ability to determine the source or direction of sounds in the environment • Examples: finding the open player calling for the ball, blindfolded players attempting to stop a ball that is emitting a sound Temporal Auditory Perception • Ability to recognize and discriminate among variations of auditory stimuli presented in time • Distinguishing rate, emphasis, tempo, and order of auditory stimuli • Example: difficulties in rhythmic movement, dance, and singing games Auditory–Motor Coordination • Ability to coordinate auditory stimuli with body movements • Examples: responding to a beat in music (e.g., ear–foot coordination) or to a particular cadence (e.g., football signals), performing a routine to a musical accompaniment Application Example See application examples in the textbook for ideas regarding fun, stimulating activities designed to promote the sensory systems: • Spiderweb: spatial awareness • Walk the Pirate’s Plank: dynamic balance • Drive Your Car: directionality • Surprise Bag: tactile awareness Typical Components and Activities Associated With Sensorimotor Development