BEEP BEEP! 2. Loses sleep.
But then, without so much as a horn beep, 50 men start to walk over to our car, carrying bits of wood, rocks and scraps of plastic.
But then, without so much as a horn beep, 50 men start to walk over to our car, carrying bits of wood, rocks, and scraps of plastic.
We fixed the task order across participants in each block to optimize performance as follows: 2 Hz beeps with no movement, 2 Hz isorhythmic tapping, 2 Hz polyrhythmic tapping (2 Hz beep, 3 Hz movement; 3 Hz beeps with no movement, 3 Hz isorhythmic tapping, 3 Hz polyrhythmic tapping (3 Hz beep, 2 Hz movement).
Subjects were instructed to begin movement on the third beep and to try to reach the target circle by the fourth beep, 600 ms later.
The blocks were separated by a 4-s interval and each block was preceded by a beep (2000 Hz, 200 ms) presented monaurally to the ear that was about to receive the target stimuli in that block.
In order to test the effect of beeps on the number of flashes reported, the mean responses for the five 1-flash trials were submitted to a repeated-measures Analysis of Variance (ANOVA), with a 5-level within-subjects factor Beep (0 4 beeps).
The third-sixth trials comprised the familiarization phase where four stimulus conditions were tested: two directions of flash presentation (upward or downward presentation) and two temporal separations of onset between the second flash and the second beep (+/−150ms lead of beep from flash).
Two different sounds were used as external feedback; a 74 Hz beep (55 ms) indicating an error and a 740 Hz beep (55 ms) indicating a correct answer.
Feedback for participants' prediction was either 'correct' plus a high pitched beep (22,050 Hz, 500 ms) or 'incorrect' plus a low pitched beep (44,100 Hz, 500 ms) for 1 s.
The smartphone produced an audible alert ("beep") 5 times during the day, signaling participants to complete a survey about their recent stressors, current activities and emotions, and recent thoughts.
