Pekka Räsänen investigated interventions for children with low numeracy. Randomizing children between two numerical games allowed the study to compare particular training arrangements and subsequent outcomes. Improvement on practiced material and transfer to a wider numerical ability are different questions, so both the training content and the outcome task are needed to interpret an intervention. [ref]

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Figure 1.
Portrait of Larry Squire
. Via Wikimedia Commons; credits and usage information are on the linked source file page. Source.

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A developmental neuropsychologist investigating language difficulties and their assessment.[ref]

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Sasha Bozeat studied conceptual knowledge in semantic dementia using assessments that reduced verbal input and output demands. Nonverbal tasks test whether a difficulty extends beyond finding the name of an object. Comparing tasks across modalities therefore helps separate a language-specific naming problem from a broader impairment in the knowledge used to recognize or use objects. [ref]

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María Roca studied executive function after frontal brain lesions. Comparing executive-task deficits with fluid intelligence asks which difficulties reflect shared demands and which remain unexplained by that measure. Statistical adjustment is informative about the tested relationship, while less structured activities can reveal demands not fully captured by standard laboratory tasks. [ref]

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Marie-Thérèse Perenin investigated optic ataxia through visually guided arm movements in people with parietal brain lesions. The comparison asks how visual information guides an action rather than treating accurate seeing and accurate reaching as one ability. Lesion location, visual-field conditions and the movement being tested help distinguish the particular visuomotor difficulty. [ref]

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A neuropsychologist whose studies of imagined space and awareness of neurological deficits helped distinguish spatial inattention from elementary visual loss and from awareness of incapacity.

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Tim Shallice studied selective cognitive deficits and control of behavior after frontal brain lesions. Open-ended tasks with several subgoals test whether a person organizes and reactivates intentions when there is no single external prompt for each step. Such tasks complement short structured tests by making the coordination of actions itself part of the measurement. [ref]

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Elizabeth Warrington studied human memory through selective patterns of preservation and impairment. With Tim Shallice, she investigated the patient published as K.F., whose auditory-verbal short-term memory was selectively impaired. Comparing that profile with other human memory measures constrains models of the relationship between temporary retention and longer-term learning, rather than reducing the case to one overall human memory score. [ref]

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Justin S. Feinstein studied fear and bodily signals in people with bilateral amygdala damage. A carbon-dioxide inhalation challenge investigated panic responses through a route different from viewing an external threat. Comparing these responses shows why a brain structure’s contribution must be specified for the stimulus and outcome being measured rather than summarized as the single location of all fear. [ref]

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Morgan D. Barense studies relationships between human memory, perception and medial temporal brain systems. Her patient study examined online discrimination of complex objects, asking whether impairments concern only retaining information across a delay or also representing objects while they are present. Comparisons between lesion patterns and task demands help separate these explanations. [ref]

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A neuropsychologist who, with William Beecher Scoville, described profound human memory impairment after bilateral medial temporal surgery. The study connected lesion location to severe difficulty acquiring new experiences while documenting other retained capacities. It helped establish that human memory cannot be understood as one undifferentiated faculty whose every component is equally disrupted by a lesion.[ref]
Figure 1.
Portrait of Brenda Milner
. Per Henning/NTNU; CC BY 2.0. Source.

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