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23 mar 2010 · A blocked design consists of different blocks of trials of the same stimulus type and is characterized by three factors: the length of blocks, i.e., number of trials per blocks, the ordering of task and rest blocks, and the time between trials within one block.
- Psychometrika
2.9 (2023) 5-year Journal Impact Factor 2.8 (2023)...
- Psychometrika
There are two major types of experimental design used in fMRI: (1) the block design and (2) the event-related design. The block design was the first approach used in early fMRI experiments and is quite easy to implement.
Blood Oxygen Level Dependent (BOLD) functional magnetic resonance imaging (fMRI) depicts changes in deoxyhemoglobin concentration consequent to task-induced or spontaneous modulation of neural metabolism.
nal magnetic resonance imaging (fMRI) are useful to localize functional brain areas. A blocked design consists of different blocks of trials of the same stimulus type and is charac-terized by three factors: the length of blocks, i.e., number of trials per blocks.
In this study, we compared a blocked design and a rapid event-related design with a jittered inter-stimulus-interval (ISI) (or stochastic design) for language fMRI in six healthy controls, and eight brain tumor patients, using a vocalized antonym generation task.
Below is an outline of the experiment designs that will be discussed, along with information regarding randomization of stimulus trials and fixed versus stochastic or "jittered" inter-stimulus intervals (ISI) in rapid event-related design: 1) Block Design 2) Event-Related Design (ER-FMRI) A. "Slow" Event-Related Design B. "Rapid" Event-Related ...
A blocked design consists of different blocks of trials of the same stimulus type and is characterized by three factors: the length of blocks, i.e., number of trials per blocks, the ordering of task and rest blocks, and the time between trials within one block.
