Study: NCT03502603

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Railroad Test
Description: This is a test designed to evaluate visual perception capacities and requires the participant to match photographs with railroads as a central theme. The participant is presented with a photograph image at the top of the screen and is asked to match it to one of the two, three or four choices in the lower portion of the display.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Swamp Test
Description: This is a test of immediate visual memory/attention for photographs with swamp wetlands as a central theme. The participant is briefly presented with a photograph which is replaced by two, three or four choices, one of which the participant is asked to select as the initially presented image.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Swamp Test
Description: This is a test of immediate visual memory/attention for photographs with swamp wetlands as a central theme. The participant is briefly presented with a photograph which is replaced by two, three or four choices, one of which the participant is asked to select as the initially presented image.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Presidents Recognition Test
Description: This is a test of history knowledge and facial recognition using pictures of US presidents and non-president distractors. The participant is presented with two photographs and is asked to identify which is the picture of a US president

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Presidents Recognition Test
Description: This is a test of history knowledge and facial recognition using pictures of US presidents and non-president distractors. The participant is presented with two photographs and is asked to identify which is the picture of a US president

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Judgment of Line Orientation
Description: This test requires participants to visually match the orientation of line segments. This is a test of visual perception and was included as a relative equivalent of the Railroad Test.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Judgment of Line Orientation
Description: This test requires participants to visually match the orientation of line segments. This is a test of visual perception and was included as a relative equivalent of the Railroad Test.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Symbol Span subtest of the Wechsler Memory Scale-IV
Description: This test requires participants to immediately recall a sequence of designs after a brief presentation. This is a test of immediate visual memory/attention and was included as a relative equivalent of the Swamp Test

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Symbol Span subtest of the Wechsler Memory Scale-IV
Description: This test requires participants to immediately recall a sequence of designs after a brief presentation. This is a test of immediate visual memory/attention and was included as a relative equivalent of the Swamp Test

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Information subtest of the Wechsler Adult Intelligence Scale-IV:
Description: This test requires participants to answer factual knowledge questions. This is a test of fund of knowledge and was included as a verbal equivalent for the non-verbal Presidents Recognition Test.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Information subtest of the Wechsler Adult Intelligence Scale-IV:
Description: This test requires participants to answer factual knowledge questions. This is a test of fund of knowledge and was included as a verbal equivalent for the non-verbal Presidents Recognition Test.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Digit Span subtest of the Wechsler Adult Intelligence Scale-I
Description: This test requires the participant to repeat sets of digits forward, backward, and to sequence digits in ascending order. This is a test of immediate memory/attention and was included to investigate possible attentional correlates of the Swamp Test. This test includes a performance validity indicator that will permit analyses of validity indicators included with the experimental tests

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Digit Span subtest of the Wechsler Adult Intelligence Scale-I
Description: This test requires the participant to repeat sets of digits forward, backward, and to sequence digits in ascending order. This is a test of immediate memory/attention and was included to investigate possible attentional correlates of the Swamp Test. This test includes a performance validity indicator that will permit analyses of validity indicators included with the experimental tests

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Reading subtest of the Wide Range Achievement Test
Description: This test requires participants to read words printed on a card. This is a test of word knowledge/academic achievement and was included to investigate the academic achievement concomitants of the Presidents Recognition Test.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Reading subtest of the Wide Range Achievement Test
Description: This test requires participants to read words printed on a card. This is a test of word knowledge/academic achievement and was included to investigate the academic achievement concomitants of the Presidents Recognition Test.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Symbol Digit Modalities Test:
Description: This test requires participants to visually match abstract symbols with numbers within a certain time period. The participant either verbalizes or writes the response on an answer sheet. This is a test of speed of information processing and was included to assess speed of response factors pertaining to all of the experimental tests as reflecting speed of information processing.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Symbol Digit Modalities Test:
Description: This test requires participants to visually match abstract symbols with numbers within a certain time period. The participant either verbalizes or writes the response on an answer sheet. This is a test of speed of information processing and was included to assess speed of response factors pertaining to all of the experimental tests as reflecting speed of information processing.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Dot Counting Test
Description: This test requires participants to count arrays of dots presented on a card while being timed. This is a performance validity test and was included to ascertain validity factors pertaining to each of the experimental tests.

Intervention type: DIAGNOSTIC_TEST
Group type: ACTIVE_COMPARATOR
Intervention: Dot Counting Test
Description: This test requires participants to count arrays of dots presented on a card while being timed. This is a performance validity test and was included to ascertain validity factors pertaining to each of the experimental tests.