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Hi all, I have a problem with TTL signals sent through parallel port to my EEG recording software SCAN 4.3. I have designed a verbal dot probe paradigm in inquisit 3 and my cue signals work fine, however, target marker do not ppear in the SCAN software.
Here is how I have defined the ports:
########################### cue ports ###########################
<port pleasant_L_signal> / port = lpt1 / subport = data / items = ("00000001") </port> 1
<port pleasant_R_signal> / port = lpt1 / subport = data / items = ("00000011") </port> 3
<port unpleasant_L_signal> / port = lpt1 / subport = data / items = ("00000111") </port> 7
<port unpleasant_R_signal> / port = lpt1 / subport = data / items = ("00001111") </port> 15
<port neutral3_L_signal> / port = lpt1 / subport = data / items = ("00011111") </port> 31
<port neutral3_R_signal> / port = lpt1 / subport = data / items = ("00111111") </port> 63
########################## target ports ##########################
****************pleasant****************
<port pleasantleft_valid_signal> / port = lpt1 / subport = data / items = ("11100000") </port> 224
<port pleasantleft_invalid_signal> / port = lpt1 / subport = data / items = ("11110000") </port> 240
<port pleasantright_valid_signal> / port = lpt1 / subport = data / items = ("01111111") </port> 127
<port pleasantright_invalid_signal> / port = lpt1 / subport = data / items = ("11111111") </port> 255
***********unpleasant*******************
<port unpleasantright_valid_signal> / port = lpt1 / subport = data / items = ("10000000") </port> 128
<port unpleasantright_invalid_signal> / port = lpt1 / subport = data / items = ("11000000") </port> 192
<port unpleasantleft_valid_signal> / port = lpt1 / subport = data / items = ("11111000") </port> 248
<port unpleasantleft_invalid_signal> / port = lpt1 / subport = data / items = ("11111100") </port> 252
**************neutral*****************
<port neutral3left_valid_signal> / port = lpt1 / subport = data / items = ("01010101") </port> 85
<port neutral3left_invalid_signal> / port = lpt1 / subport = data / items = ("01111110") </port> 126
<port neutral3right_valid_signal> / port = lpt1 / subport = data / items = ("01111000") </port> 120
<port neutral3right_invalid_signal> / port = lpt1 / subport = data / items = ("01111100") </port> 124
and here is what my trials look like (one example):
<trial pleasantright_valid_isi50> / pretrialsignal = (lpt1, 96) / response = timeout (1700) / correctresponse = (112) / validresponse = (104, 112) / responsemessage = (noresponse, pnoresponse, 50) / responsemessage = (112, pkorrekt, 50) / responsemessage = (104, pfalsch, 50) / stimulustimes = [0=fixation; 500= pleasantright, neutral_1_left, pleasant_R_signal; 1000= erasewords_right, erasewords_left; 1050= proberight, pleasantright_valid_signal; 1200=eraseprobe_right] </trial>
What have I done wrong? Any help is greatly appreciated! Anna
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