.para format

design information file

A design information file (*.para) lists the onset/duration/type of all events or blocks in your experimental design. PARA files are text files containing fieldname/fieldvalues pairs using the syntax:

#fieldname

fieldvalue1

fieldvalue2

...

Design information files may have a combination of the following fields:

#onsets : event onset times

Nx2 array with onset times for each event/block in the first column and condition number (1-M) for each event/block in the second column

#durations: event durations

Nx1 array with duration of each event/block OR 1xM array with duration of each condition

#names : condition (event-type) names

1xM cell array with condition names (note: condition names cannot contain whitespace charaters)

#units : units for onset/duration values

scans / secs (default: scans)


(optional fields only applicable when multiple within-condition effects are estimated)

#orth : orthogonalize within-condition measures

1/0 array indicating whether within-condition regressors should be GS orthogonalized [1]

(optional fields for temporal modulation)

#tmod : temporal modulation

1xM 1/0 array indicating whether condition M is modulated by time (if values >1 are entered they are interpreted as polynomial order of temporal modulation effects)

(optional fields for parametric modulation)

#pmod : parametric modulation

KxM 1/0 array indicating whether condition M is modulated by covariate K

#pmod_names : parametric modulation covariate-names

1xK cell array of covariate names (note: covariate names cannot contain whitespace characters)

#pmod_values : parametric modulation covariate-values

NxK matrix of covariate values (e.g. reaction time)

(optional fields for parametric modulation when the same parametric modulation affects multiple conditions)

#pmod_interaction : parametric modulation/interactions or main-effects only

1xK 1/0 array indicating whether to include condition-by-covariate interactions for each covariate (0 when parametric covariate effects are common across all conditions where it is present) [1]

(optional fields for non-parametric modulation; estimation of individual trial-level effects)

#npmod : individual-trial/event effects

1xM 1/0 array indicating whether condition M is broken down into individual-trial effects


designID.para example:

% onset_time (in scans units) / task_type

#onsets

0.00 1

4.00 2

8.00 1

13.00 1

16.00 1

20.00 1

24.00 1

30.00 1

36.00 2

42.00 2

45.00 2

48.00 1

52.00 1

55.00 2

60.00 2

65.00 2

70.00 1

75.00 2

79.00 1

82.00 1

85.00 2

88.00 1

94.00 1

97.00 1

104.00 1

107.00 2

111.00 2

115.00 2

120.00 2

126.00 1

131.00 2

134.00 2

138.00 2

143.00 1

147.00 2

153.00 2

160.00 2

163.00 1

166.00 1

172.00 2


% task names

#names

Speech NonSpeech


% task durations (in scans units)

#durations

3 3


% time units (scans/secs)

#units scans