Neurolinguistic & psycholinguistic investigations on evidentiality in Turkish

5.2.4.
 
Procedure
Presentation of visual and audio stimuli was programmed in two lists by 
using the SMI experiment builder software (SensoMotoric Instruments 
GmbH). A participant saw two photos presented next to each other in each 
trial, as described above. The evidential items were counterbalanced across 
participants over the two lists, so that an evidential item only appeared in 
either the direct or the indirect evidential condition. Each participant saw 
ten direct and ten indirect evidential items. In addition, 20 future tense items 
were added to each list as non-evidential distractor items. Therefore, each 
participant was exposed to an equal number of evidential and non-evidential 
items. A further 20 filler items, containing a subject participle complement 
clause (i.e. a non-finite verb form: 
Hangi fotoğraftaki adam dün yemeği 
pişiren adam
“which photograph
LOC 
man yesterday food
ACC 
cook 
SUBJECT 
PARTICIPLE 
man?”), were added so that each presentation list contained 60 
items. Presentation of the auditory stimuli was delayed by one second with 

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respect to the visual stimuli in all items. Pauses were programmed after 
every block of 20 items. The items were presented in a randomized manner.
Participants were tested individually in a dedicated testing room in 
Berlin. They were asked to sit within a convenient sight distance from a 
1680x1050 pixels-wide (i.e. 22 inches) PC screen. They were then given the 
following instructions in Turkish: “You are about to begin an eye-tracking 
experiment. Please listen to the sentences carefully, and click on the 
photograph that corresponds to the sentences you hear. When you click the 
next item will begin.” Two practice trials were presented during which the