文勇的新托福黄金&ccedil

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Unformatted text preview: able to perceive the new stimulus as different. The habituation­dishabituation paradigm has been used most extensively with studies of auditory and olfactory perception in infants. The second technique relies on evoked potentials, which are electrical brain responses that may be related to a particular stimulus because of where they originate. Changes in the electrical pattern of the brain indicate that the stimulus is getting through to the infant's central nervous system and eliciting some form of response. 10. According to paragraph 4, which of the following leads to the conclusion that infants are able to differentiate between stimuli in a habituation dishabituation study? ○Dishabituation occurs with the introduction of a new stimulus. ○Electrical responses in the infant's brain decline with each new stimulus. ○Habituation is continued with the introduction of a new stimulus. ○The infant displays little change in electrical sbrain responses. 11. In paragraph 4, what does the author suggest about the way an infant's brain perceives stimuli? ○An infant's potential to respond to a stimulus may be related to the size of its brain. ○Changes in the electrical patterns of an infant's brain are difficult to detect. ○Different areas of an infant's brain respond to different types of stimuli. ○An infant is unable to perceive more than one stimulus at a time. Paragraph 5 在 Each of the preceding techniques provides the researcher with evidence that the infant can detect or discriminate between stimuli. With these sophisticated observational assessment and electro physiological measures, we know that the neonate of only a few days is far more perceptive than previously suspected. However, these measures are only "indirect" indicators of the infant's perceptual abilities. 12. Paragraph 5 indicates that researchers who used the techniques described in the passage discovered that ○infants find it difficult to perceive some types of stimuli ○neonates of only a few days cannot yet discriminate between stimuli 385 Mail@liuwenyong.com 在在在在在在 www.liuwenyong.com 在在在在在在在在在在在在在在在,在在在在在在在在在在 ○observational assessment is less useful for studying infant perception than researchers previously believed ○a neonate is able to perceive stimuli better than researchers once thought Paragraph 3 在 Observational assessment techniques have become much more sophisticated, reducing the limitations just presented. Film analysis of the infant's responses, heart and respiration rate monitors, and nonnutntive sucking devices are used as effective tools in understanding infant perception. ■Film analysis permits researchers to carefully study the infant's responses over and over and in slow motion. ■Precise measurements can be made of the length and frequency of the infant's attention between two stimuli. ■Heart and respiration monitors provide the investigator with the number of heartbeats or breaths taken when a new stimulus is presented. ■Numerical increases are used as quantifiable indicators of heightened interest in the new stimulus. Increases in nonnutntive sucking were...
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