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Operant paradigms have more commonly been used, beginning with Friedlander's (1968). Playtest procedure in which infants operate an automated device more head-turns in the direction required to produce infant-directed speech, or motherese than in the direction required to produce normal adult speech. METHOD.
Operant conditioning of head turning in 4-mo. human infants was demonstrated. Head rotations to the right However, further development of operant procedures with infants in their first months of life has confronted using a combination of classical and operant tech- niques to study the head turning response in infants,.
For almost a decade, the Head-Turn Preference. Procedure (HPP) has been used in infant speech perception research. Over this period, the pro- cedure has evolved in ways that render it more sensitive and also more flexible in its applica- tion to experimental questions and to infants of different ages. Because HPP is
When we use a video of flashing light in the headturn preference procedure during familiarization and test, infants fail to discriminate our target words. However, when we use a more engaging visual stimuli, a video of spinning colorful pinwheel in HTPP, they succesfully discriminate the target words. It sounds like using a
(visually reinforced infant speech discrimination). Figure 1. A schematic diagram of the Conditioned Head. Turn procedure. Figure 2. Madeleine performing in Minimal instructions are given if direct comparison with infants is of interest. With younger children (between roughly. 2 and 5 years) the head turn response can be.
abilities in very young infants. In this chapter, we discuss 3 infant testing procedures that are well suited to investigate the receptive language abilities of young children: the visual fixation procedure (VFP), the headturn preference procedure (HPP), and the preferential looking procedure (PLP). Throughout our discussion, we
A number of experimental procedures have been used in carrying out this research, including the High Amplitude Sucking Procedure for infants between birth and 3–4 months of age, the Conditioned or Operant Head-Turn Procedure for infants between 5.5 and 18 months of age, the Visual Habituation or Fixation

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March 2018