Thus, the target location was cued on half of the trials and uncued in the other half.
Each of the 4 blocks of experimental trials consisted of 128 trials, 64 cued and 64 uncued.
Whereas the group without a fixation cue showed a significant facilitatory effect (RT was 58 ms shorter for cued than for uncued trials, F(1, 14)=9.
According to these authors, participants may adopt a general set that modulates the extent to which two spatio-temporally contiguous events, such as the cue and target on cued trials at short SOAs, are encoded as part of the same event representation.
In this way, an event integration process might be particularly helpful on cued trials in difficult discrimination tasks, producing large and long lasting facilitation effects.
To determine the effects of display platform and cuing on the secondary task, a 2 (display) x 3 (cue: cued precise, cued imprecise, uncued) within-subjects ANOVA was conducted on both the response time and the accuracy for the secondary task.
By eliminating scanning between the "real world" in the forward field of view and the handheld display, the HMD allowed participants to demonstrate superior performance, as measured by the target detection latencies of accurately cued targets.
To examine this aspect we compared average detection times as a function of the cue parameters (for cued and uncued targets and for false alarms).
This measure can indicate whether observers first scan the cued targets and only then search for noncued targets or if they use any other strategy in their visual search.
The subsequent presentation of the search task stimuli inside the cued shape would allow its privileged processing, in an analogous way to what happens with stimuli presented in cued objects and spatial positions (eg.
In the two experiments, the valid cue provided an improvement in performance in relation to no-cue trials, suggesting that information about the size and orientation of the frame could be used to privilege the processing of stimuli presented inside the cued shapes.
When cuing was only 75% reliable, all distractors were always cued, and these distractor objects were present (and cued) on 25% of the trials.
1999, Experiments 1 and 2), the unexpected target was less likely to be detected when it was presented with a cued object (soldier) than with an uncued one.
As can be seen in the table, the analysis revealed significant main effects of Task, Session, and Cueing: Subjects performing the detection task were faster than those who performed the discrimination task; RT was shorter for uncued than cued trials; and RT decreased with practice.
In each experimental block there were 40 cued trials, 40 uncued trials, and 20 catch trials.