(2006) showed a trend of increasing blink amplitude from pleasant to neutral and unpleasant pictures in the control group.
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Physiological reactivity at rest and in response to social or emotional stimuli after a traumatic brain injury: A systematic review.
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The sentences
In contrast, in the TBI group, the difference between the unpleasant and neutral pictures did not reach statistical significance, and no difference between the pleasant and neutral pictures was observed.
It would be important to gather more data to identify a clear trend.
Similarly, a marginally significant positive correlation was observed with affective empathy.