Available online
Description
Derek Corcoran introduces the programme. He is holding a cup of coffee and asks students to estimate how far down his spoon will go into the cup. (This is of course an optical illusion) Corcoran ou...tlines the rest of the programme. It will deal with the perception of speech and the perception of movement. John Morton with a speech spectrograph. He records and analyses the words 'I yell' & 'I scream'. As he does so he explains how the speech spectrograph works. Morton next records and analyses the words 'chocolates and ice cream' on the speech spectrograph. He compares this analysis with the first one and finds that 'I scream' and 'ice cream' are identical sounds. Morton explains why the two identical sounds are perceived differently. Morton next does an experiment in which listeners are asked to write down the word they hear played on a tape recorder. The recorder plays a sentence "Please say what this word is" and then a word. The recording is synthetic for uniformity. Morton puts the sentences and words through the speech spectrograph and compares the results. The words are identical although they were heard to be different. Morton explains why. Morton, with the spectrograph recording of the sounds ee, oo, dee, doo. He shows how different sounds can be heard to be the same. Derek Corcoran sums up Mortons experiments. The rest of the programme consists of several demonstrations by Concoran of the perception of visual movement. Viewers are asked to fixate on a bar on the screen while a spot is moved back and forth across the screen. Corcoran uses a diagram of the eye to show what is happening on the retina. This time viewers are asked to fixate on the moving spot as it oscillates back and forth across the stationary bar. Corcoran again uses a diagram of the eye to show what is happening. Corcoran next does a series of demonstrations which show that movement can be perceived even when there is no movement across the retina. Two T.V. cameras switching rapidly on and off are used. Corcoran uses diagrams of the eye to explain how movement is perceived in this case. Corcoran describes the rest of deductions which the brain makes when confronted with this sort of visual information. Corcoran sums up.
Derek Corcoran introduces the programme. He is holding a cup of coffee and asks students to estimate how far down his spoon will go into the cup. (This is of course an optical illusion) Corcoran ou...tlines the rest of the programme. It will deal with the perception of speech and the perception of movement. John Morton with a speech spectrograph. He records and analyses the words 'I yell' & 'I scream'. As he does so he explains how the speech spectrograph works. Morton next records and analyses the words 'chocolates and ice cream' on the speech spectrograph. He compares this analysis with the first one and finds that 'I scream' and 'ice cream' are identical sounds. Morton explains why the two identical sounds are perceived differently. Morton next does an experiment in which listeners are asked to write down the word they hear played on a tape recorder. The recorder plays a sentence "Please say what this word is" and then a word. The recording is synthetic for uniformity. Morton puts the sentences and words through the speech spectrograph and compares the results. The words are identical although they were heard to be different. Morton explains why. Morton, with the spectrograph recording of the sounds ee, oo, dee, doo. He shows how different sounds can be heard to be the same. Derek Corcoran sums up Mortons experiments. The rest of the programme consists of several demonstrations by Concoran of the perception of visual movement. Viewers are asked to fixate on a bar on the screen while a spot is moved back and forth across the screen. Corcoran uses a diagram of the eye to show what is happening on the retina. This time viewers are asked to fixate on the moving spot as it oscillates back and forth across the stationary bar. Corcoran again uses a diagram of the eye to show what is happening. Corcoran next does a series of demonstrations which show that movement can be perceived even when there is no movement across the retina. Two T.V. cameras switching rapidly on and off are used. Corcoran uses diagrams of the eye to explain how movement is perceived in this case. Corcoran describes the rest of deductions which the brain makes when confronted with this sort of visual information. Corcoran sums up.
| Module code and title: | SDT286, Biological bases of behaviour |
|---|---|
| Item code: | SDT286; 07 |
| First transmission date: | 15-04-1972 |
| Published: | 1972 |
| Rights Statement: | |
| Restrictions on use: | |
| Duration: | 00:24:30 |
| + Show more... | |
| Producer: | Vic Lockwood |
| Contributors: | Derek Corcoran; John Morton |
| Publisher: | BBC Open University |
| Keyword(s): | Movement perception; Moving spot experiment; Retina; Speech perception; Speech spectrograph; Word test |
| Master spool number: | 6LT/70284 |
| Production number: | 00521_2192 |
| Videofinder number: | 2093 |
| Available to public: | no |
