Cognitive Psychology Addendum
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- 177. Describe density of rods and cones as a function of degrees from fovea
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Image -
178. What do cones see?
What part of the visual field do cones see? -
Cones see colors and fine details
Cones also see the center of the visual field - 180. How do surrounding letters affect visual acuity?
- They serve as visual distractors and decrease visual acuity
- 180. Describe the visual acuity for word identification
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See Graph - 181. What does word identification depend upon?
- Word identification depends upon high-resolution vision
- 182. What is high-resolution vision limited to?
- Limited to the fovea (central 2⁰ of visual field)
- 183. How does visual resolution decrease as you move from fovea?
- As you move from fovea to parafovea to peripheral vision, visual resolution decreases rapidly
- 184. How far doe the parafovea extend?
- It extends 5⁰ from center
- 185. What is the most fundamental task of reading?
- Eye movement
- 186. Where do eye movements place words during reading?
- Eye movements are directed so as to place each word in the fovea
- 188. What are saccades?
- Ballistic movements that move the eyes from one location to the next (derived from French word meaning "jump")
- 189. What is the oculomotor system?
- Neural systems that program and execute saccades
- 187. What are two types of eye movements?
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1. Voluntary eye movements (saccades in reading)
2. Smooth eye movements - 190. How long does it take to program saccades?
- 180-230 ms
- 191. What are the two stages in which saccades are programmed?
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1. First (labile) stage
2. Second (non-labile) Stage -
192. How long does the labile stage take?
Can it be canceled? -
1. 140-170 ms
2. Can be canceled -
193. How long does the non-labile stage take?
Can it be canceled? -
1. 40-80 ms
2. Cannot be canceled - 194. What is the duration of saccades?
- 20-35 ms
- 195. How long does it take for information to go from the retina to the brain?
- 50 ms
- 200. What is an eye tracker?
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-It measures eye movement
-It's used to help learn how we control eye movements - 201. What are the three types of eye trackers?
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1. Video-based
2. Search-coil
3. Dual-Purkinje Image (DPI) -
202. Describe the video-based eye tracker.
Four points... -
1. Poor spatial resolution
(âº/â‚‹ 1.5â°)
2. Fair temporal resolution
(250 Hz)
3. Very easy to use
4. Can be mounted on head; not affected by head motion -
202. Describe the search-coil eye tracker.
Three points... -
1. Excellent spatial resolution (âº/â‚‹ 2â°)
2. Good temporal resolution (1000 Hz)
3. It's invasive; subjects must wear a contact lens -
203. Describe the Dual-Purkinje Image eye tracker.
Four points... -
1. Excellent spatial resolution (âº/â‚‹ 1â°)
2. Excellent temporal resolution (4000 Hz)
3. Uses a bite-bar to reduce head motion
4. Can be difficult to operate -
206. What are some general properties of saccades with English text?
Two things... -
1. Typically move the eyes forward 7-9 character spaces (2⁰)
2. Character spaces are appropriate metric (due to trade-off between visual resolution and viewing distance) - 207. What is regression?
- 10-15% move eyes backwards
- 208. What does regression reflect?
- Often it reflects difficulty with higher-level language processing
-
209. What are some general properties of fixations with English text?
Three things... -
1. Typically 200-300 ms in duration (range = 50-500 ms)
2. Visual information is extracted from page only during fixations
3. Approximately 80% of words are fixated in normal text -
210. What are some prosperities of non-fixated words?
Three things... -
1. Short
2. Highly frequent words
3. Highly predictable words from context - 211. What two parameters do eye trackers measure and record?
-
1. When the eyes move
2. Where the eyes move - 212. What do these two parameters provide researchers with?
- They provide a complete record of a subject's eye movements during reading
- 213. What happens to the data taken by eye trackers?
- The data is reduced (made manageable) using word-base measures (means)
-
214. In the following sentence identify where fixation occurs:
"Exercise may spark creative thinking" -
Eye movements in reading -
215. Identify the following:
a. first-fixation duration
b. single-fixation duration
c. gaze duration
d. total viewing time -
A. "Creative" = 179 ms
B. "Spark" = 312 ms
C. "Creative" - 299 ms (doesn't include regression)
D. "Creative" = 487 ms -
216. Identify:
a. probability of fixating
b. probability of skipping
c. probability of re-fixating -
A. "Creative" = 0.98
B. "Creative" = 0.02
C. "Creative" = 0.24 -
217. How is reading speed measure?
What does reading speed depend upon? -
-Rate is measure in words-per-minute (WPM)
-Rate depends on skill of reader and difficulty of text - 218. What is the upper rate on reading speed?
- About 400 WPM (with complete comprehension)
-
219. What constrains rate on reading speed?
Two things... -
1. Visual acuity
2. Eye-movement times - 220. What happens when reading rates are greater than 400 WPM?
- Not comprehending, just skimming
-
221. Why is reading important?
What is the prominent domain of reading? -
-Reading is a way to understand language
-Eye movement is main domain of reading -
223. What are some basic language processing effects and what researchers look at them?
Two things... -
1. Frequency effects (Just & Carpenter)
2. Predictability effects (Ehrlich & Rayner) - 224. What are frequency effects?
- High frequency words (e.g "the") are fixated for less and are skipped more often than low frequency words (e.g "ostrich")
- 225. Describe the two conditions of the experiment to illustrate frequency effects.
-
-Condition 1 used high frequency words
-Condition 2 used low frequency words -
226. What was found in the frequency effect experiment?
Two things... -
1. High frequency words fixated for less time
2. More frequent words are better represented in semantic memory and thus have quicker retrieval - 227. What are predictability effects?
- Predictable words are fixated for less time and are skipped more often than less predictable words
-
228. What did Rayner et al. find from manipulating predictable and unpredictable words in various sentences?
Two things... -
1. In predictable condition, p=.78
2. In unpredictable condition, p <.01 (context word) - 229. What happens in a gaze-contingent experiment?
- Information on monitor is dependent upon where subject is looking
- 230. What is a moving-window paradigm?
- Window is contingent on where subject is looking
- 231. Moving-Window Paradigm
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Gaze-Contingent - 233. What is the perceptual span?
- Effective visual field during reading
- 234. What did McConkie and Rayner look at regrading perceptual span?
- Wanted to determine what is the size of the perceptual span
- 235. What was the design of McConke and Rayner's experiment?
-
-Varied size of moving window: 13,17,21,25,31,37,45, or 100 character spaces
(screen size = 100 spaces)
-Subjects read 500-word passage - 236. What were the results of McConkie and Rayner's experiment?
-
-13 characters (7 character spaces to the right and left of fixation)reduced rate by 60%
-31 characters (15 character spaces to the right of fixation) normal rate
-Subjects in all conditions had normal comprehension - 237. What conclusion was drawn from these results?
- When there was too few characters to the right, subjects did not get all the information they would normally use in reading
- 238. What did McConkie and Rayner do in their second experiment?
-
Varied properties of text:
X's w/ spaces vs X's w/o spaces - 239. McConkie and Rayner Second Experiment
-
Text -
240. How did the text differ?
Six ways... -
1. X's w/ spaces
2. X's w/o spaces
3. Similar letters, spaces
4. Similar letters, no spaces
5. Dissimilar letters, spaces
6. Dissimilar letters, no spaces -
241. What were the results for the X's with spaces vs X's without spaces?
Three things... -
1. No spaces: reduced rate for windows < 31 characters
2. Black spaces are used to guide eye movements
3. Space information: extracted up to 15 characters to right of fixation -
242. What were the results for similar vs dissimilar letters?
Two things... -
1. Different letter shape: reduced reading speed for windows < 21 (interference w/ pattern recognition)
2. Letter shape information: extracted up to 10 character spaces to right of fixation - 243. How does perceptual span depend upon density?
-
-Varies in size, depending upon the "density" of the writing system
-Denser language has smaller perceptual span
Examples: Hebrew < English; Japanese < English - 244. How is the perceptual span asymmetric?
- Right edge extends further than left edge (McConkie & Rayner)
-
245. Describe the asymmetry of the perceptual span.
Three points... -
-14 characters left + 14 characters right = normal rate
-4 characters left + 14 characters right = normal rate
-14 characters left + 4 characters right = much slower rate -
246. How are the left and right edges of the perceptual span defined differently?
Two ways... -
1. Left edge = beginning (left edge) of fixated word
2. Right edge = number of visible letters -
247. How do we know asymmetry is attention-based and not "hard-wired" (Pollatstek et al.)?
Two points... -
1. Extends further to the left for native Israeli speakers reading Hebrew (which is read right to left)
2. For English-Hebrew bilinguals, extends to the right when reading English and extends to the left when reading Hebrew
*influenced by language you're reading - 248. What is the boundary paradigm?
-
Gaze-contingent paradigm
Determine how similarity between preview and post view word influence processing of post view word - 249. Boundary Paradgim
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When boundary is hit, the pre-target word is changed to the post-target word (boundary can't be seen) -
250. What is a fast priming paradigm?
Two things -
1. Prime and target are displayed on the same fixation
2. Look info extracted and time course over which info is extracted - 253. What are the two types of primes in condition one?
-
1. Orthographic (spelling is similar)
2. Phonological (rhyme or sound similar) - 252. What were the conditions Lee et al. used for the primes?
-
-Condition 1: orthographic vs phonological
-Condition 2: related vs unrelated - 253. What were the prime durations used by Lee et al.?
- 5 prime durations: 29,32,35,38,&41
-
254. What were the results from the Lee et al. experiment?
Four things... -
1. Orthographic priming: significant across all prime durations
2. Phonological priming: significant w/ 29-, 32-, and 35-ms primes
3. Semantic priming: only significant w/ 32-ms prime
4. Phonological codes activated very early during identification -
255. What are other linguistic phenomena
Eight Beefy Chunks... -
1. Semantic processing (Morris; Sereno)
2. Repetition priming (Raney & Rayner; Rayner et al.)
3. Morpheme processing (Hyönä & Pollatsek; Pollatsek et al.)
4. Anaphora and co-reference (O’Brien et al.)
5. Lexical ambiguity (Binder & Rayner; Duffy et al.)
6. Phonological ambiguity (Lesch & Pollatsek)
7. Discourse factors and stylistic conventions (Birch & Rayner)
8. Syntactic ambiguity (Frazier & Rayner) - 256. What are two theories of eye-movement control?
-
1. Oculomotor/Global control
2. Processing/Cognitive control (Reichle is here) -
257. What is the oculomotor/global control theory?
Three points... -
1. Very little (if any) moment-to-moment control of eye movements during reading
2. Fixation durations reflect a global strategy (e.g., fast rate vs. slow rate)
3. Doesn't have to deal with immediate cognitive processing - 258. What are three models of oculomotor/global control?
-
1. Strategy-Tactics (O’Regan, 1992)
2. Word-Targeting (Reilly & O’Regan, 1998)
3. Minimal Control (Suppes, 1994) -
259. What is the processing/cognitive control theory?
Three points... -
1. Significant moment-to-moment control of eye movements during reading
2. Fixation durations reflect cognitive (linguistic) processing (e.g., word identification)
3. Cognition does influence moment to moment decision of eye movement - 260. What are three models of processing/cognitive control?
-
1. Reader (Just & Carpenter)
2. ASM (Reilly, 1983)
3. Mr. Chips (1997) -
261. What are the core assumptions of Reader (Just & Carpenter, 1980)
Two assumptions.... -
1. Immediacy Hypothesis
2. Eye-Mind Hypothesis - 261. What is the immediacy hypothesis?
- The eyes do not move from a word until all processing on that word is finished
- 262. What is the eye-mind hypothesis
- Only the word that is being fixated is processed.
- 263. What are two problem with these two hypotheses?
-
1. Spillover effects (contradicts immediacy)
2. Parafoveal preview (contradicts eye-mind) - 264. What are spillover effects?
- Processing difficulty on one word can “spill over,†inflating fixation times on subsequent words
- 265. What is parafoveal preview?
- The word immediately to the right of the fixated word can sometime be identified (e.g., skipping)
-
266. What are two assumptions of E-Z Reader
(Reichle et al., 1998,1999,2003,2006) -
1. Attention is allocated to only one word at a time
2. Decoupling between signal to begin shifting attention and signal to move eyes to next word - 267. What are the three basic systems that work together according to E-Z Reader?
-
1. Word Identification System
2. Visual System
3. Oculomotor System - 268. What are the two stages in the word identification system?
-
Stage 1: Familiarity Check (rapid)
Stage 2: Lexical Access -
269. What composes the visual system?
Two things... -
1. Early Processing
2. Attention (selection) -
270. What makes up the oculomotor system?
Three things... -
1. Labile Stage
2. Non-labile stage
3. Saccade generation -
271. How many stages does programming have?
Which one can be canceled and why? -
-Programming has 2 stages
-Labile stage can be canceled if familiarity check signals movement to next word (how we skip words) -
272. The time to complete familiarity check and lexical access is a function of what?
Two things... -
1. Words frequency
2. Words predictability - 251. Fast Priming Paradign
-
Lee et al.