Polyunsaturated Fatty Acids (PUFA) Status and Cognitive Function in Healthy Young Adults
The Relationship Between Serum PUFAs and Cognitive Function in Healthy Young Adults
Přehled studie
Postavení
Postavení
Podmínky
Podmínky
Typ studie
Typ studie
Zápis (Aktuální)
Zápis
Kontakty a umístění
Studijní místa
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Tyne and Wear
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Newcastle upon Tyne, Tyne and Wear, Spojené království, NE1 8ST
- Northumbria University
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Kritéria účasti
Kritéria způsobilosti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Metoda odběru vzorků
Studijní populace
Popis
Inclusion Criteria:
- Male/Female
- 18-35 years
- Healthy
- No herbal supplements/prescription medications (excl. contraceptive pill)
- Non smoker
- Native English speaker
Exclusion Criteria:
- BMI ≥ 30
Studijní plán
Jak je studie koncipována?
Detaily designu
Co je měření studie?
Primární výstupní opatření
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Simple Reaction Time (Attention)
Časové okno: Single visit
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The participant was instructed to press the 'space bar' on the laptop keyboard as quickly as possible every time an upwards pointing arrow appeared on screen.
Fifty stimuli were presented with an inter-stimulus duration that varied randomly between 1 and 3.5 seconds.
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Single visit
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Choice Reaction Time (Attention)
Časové okno: Single visit
|
An arrow appeared on the screen pointing to the left or to the right.
Participants responded with a left or right key press corresponding to the direction of the arrow.
There was a randomly varying inter-stimulus interval of between 1 and 3 seconds for a total of fifty stimuli.
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Single visit
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Four Choice Reaction Time (Attention)
Časové okno: Single visit
|
A visual representation of the four direction arrow keys of a standard keyboard was presented on screen.
The arrows 'lit up' at random on screen until the corresponding key press was made.
In all, each arrow was the target stimulus 12 times, forming a total of 48 stimuli for this task in all.
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Single visit
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Numeric Working Memory (Working Memory)
Časové okno: Single visit
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Single visit
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Alphabetic Working Memory (Working Memory)
Časové okno: Single visit
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Five random letters (A-Z) were presented sequentially for the participant to hold in memory.
This was followed by a series of 30 probe digits (15 targets and 15 distractors) for each of which the participant indicated whether or not it had been in the original series by a simple key press.
The task consisted of 3 separate trials.
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Single visit
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Corsi Blocks Span (Spatial Working Memory)
Časové okno: Single visit
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In this task nine identical blue squares appeared on screen in non-overlapping random positions.
A set number of blocks changed colour from blue to red in a randomly generated sequence.
Participants were instructed to repeat the sequence by clicking on the blocks using the mouse and cursor.
The task was repeated five times at each level of difficulty.
The sequence span increased from 4, until the participant could no longer correctly recall the sequence, resulting in a span measure of nonverbal working memory, calculated by averaging the level of the last five correctly completed trials.
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Single visit
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3-back Task (Working Memory)
Časové okno: Single visit
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A continuous string of letters (upper and lower case; inter-stimulus interval of 2.5 seconds) was presented; 45 letters in total with 15 target pairs.
For each stimulus, participants were instructed to indicate whether this was the same letter that appeared three letters before.
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Single visit
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Immediate Word Recall (Episodic Memory)
Časové okno: Single visit
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A unique set of fifteen words is presented.
Words were selected at random from a large bank of words derived from the MRC Psycholinguistic Database matched for word length, frequency, familiarity and concreteness.
Stimulus duration was one second, as was the inter-stimulus duration.
Following word presentation, the participant was allowed 60 seconds to write down as many of the words as possible.
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Single visit
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Delayed Word Recall (Episodic Memory)
Časové okno: Single visit
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The participant was again given 60 seconds to write down as many of the words presented previously as possible.
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Single visit
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Word Recognition (Episodic Memory)
Časové okno: Single visit
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The original 15 words plus 15 distractor words were presented one at a time in a random order.
For each word the participant indicated whether or not it was included in the original list of words by pressing appropriate 'yes' and 'no' keys as quickly as possible.
Stimuli remained on screen until an appropriate response had been made.
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Single visit
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Sekundární výstupní opatření
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Depression, Anxiety and Stress Scale (DASS)
Časové okno: Single visit-90 minutes
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The DASS is a set of three self-report scales designed to measure the negative emotional states of depression, anxiety and stress.
Each of the three DASS scales contains 14 items.
Subjects are asked to use 4-point (0-3) severity/frequency scales to rate the extent to which they have experienced each state over the past week.
Scores for Depression, Anxiety and Stress (0-42) are calculated by summing the scores for the relevant items, with higher scores indicating higher incidence of negative emotional symptoms.
A total score can be derived by adding scores from each of the subscales (0-126).
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Single visit-90 minutes
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Spolupracovníci a vyšetřovatelé
Sponzor
Sponzor
Publikace a užitečné odkazy
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia
Začátek studia
Primární dokončení (Aktuální)
Primární dokončení
Dokončení studie (Aktuální)
Dokončení studie
Termíny zápisu do studia
První předloženo
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Odhad)
První zveřejněno
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Odhad)
Poslední zveřejněná aktualizace
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
Další identifikační čísla studie
Další identifikační čísla studie
- 16N3
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