Bartlett viewed thinking as a high level skill exhibiting ballistic properties
that he called its “point of no return”. This paper explores one aspect of
cognition through the use of a simple model task in which human subjects are
asked to commit attention to a position in visual space other than fixation.
This instruction is executed by orienting a covert (attentional) mechanism that
seems suffic... hiện toàn bộ
The selective impairment of semantic memory is described in three patients with
diffuse cerebrallesions. These patients, selected on the basis of a failure to
recognize or identify common objects (agnosia for objects), were investigated in
detail. In particular, their perceptual, language and memory functions were
assessed, and the limits and properties of their recognition difficulties
explored. ... hiện toàn bộ
Two experiments were carried out to investigate the difficulty of making the
contra-positive inference from conditional sentences of the form, “if P then Q.”
This inference, that not-P follows from not-Q, requires the transformation of
the information presented in the conditional sentence. It is suggested that the
difficulty is due to a mental set for expecting a relation of truth,
correspondence,... hiện toàn bộ
In shadowing one of two simultaneous messages presented dichotically, subjects
are unable to report any of the content of the rejected message. Even if the
rejected message consists of a short list of simple words repeated many times, a
recognition test fails to reveal any trace of the list. If numbers are
interpolated in prose passages presented for dichotic shadowing, no more are
recalled from t... hiện toàn bộ
Two messages were presented dichotically and subjects were asked to “shadow”
whatever they heard on one ear. Somewhere in the middle the two passages were
switched to the opposite ears. Subjects occasionally repeated one or two words,
at the break, from the wrong ear, but never transferred to it for longer than
this. The higher the transition probabilities in the passage the more likely
they were ... hiện toàn bộ
Experiment I studied short-term memory (STM) for auditorily presented five word
sequences as a function of acoustic and semantic similarity. There was a large
adverse effect of acoustic similarity on STM (72·5 per cent.) which was
significantly greater (p < 0·001) than the small (6·3 per cent.) but reliable
effect (p < 0·05) of semantic similarity. Experiment II compared STM for
sequences of words... hiện toàn bộ
Right, mixed and left handers are found in binomial proportions in seven samples
of varied subjects whose lateral preferences were ascertained by several
methods. These proportions have been obtained in previous studies of humans and
animals when the performance of several actions has been recorded in complete
samples and when consistent right and left subjects have been separated from
those of mi... hiện toàn bộ
Does our limited capacity in selective listening tasks arise primarily in
perception or in response organization? To examine this, subjects were given two
dichotic messages, one primary and one secondary, and had to make two different
responses: the primary response was to “shadow” the primary message; the
secondary response was to tap on hearing certain target words in either message.
Since the s... hiện toàn bộ
The systems underlying word recognition were investigated in a single case study
of a patient (K.F.) with an acquired dyslexia. His reading performance was
related to parts of speech, word frequency and word concreteness, and his
reading errors were analysed. There was a very striking difference between his
ability to read concrete and abstract words. Furthermore visual errors, which
could not be ... hiện toàn bộ
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