Blended component group

A blended component group (Figure 1) contains two or more component groups that need to be blended.

Adding a component group

You can add component groups by clicking on New group and selecting from one of the following types:

• Counterbalanced: counterbalanced component group contains multiple component groups that need to be counterbalanced.
• Discrete: discrete component group contains a list of stimulus items and come in the following types:
  • Text: text component group contains a list of text items.
  • Image: image component group contains a list of images.
  • Audio: audio component group contains a list of audio items.
  • Video: video component group contains a list of video items.

WARNING: Adding a component group to an existing group will remove:

• all stimulus components derived from the component groups to which you are adding to, on any trials timeline they've been added to.
• any trials rules related to removed stimulus components.
• any trials rules related to the removed component groups.

Removing a component group

A component group can be removed by selecting it using the checkbox and clicking Delete in the toolbar above the table. You can also select and delete multiple component groups at once.

WARNING: Removing a component group will also remove:

• all sub-groups of the selected component groups. If you wish keep any sub-groups, you can drag them to another part of the stimulus set tree.
• all stimulus components derived from the component groups on any trials timeline they've been added to.
• any trials rules related to the root component group (if any) containing the group.
• any trials rules related to removed stimulus components.
• any trials rules related to the removed component groups.

Reordering component groups

Component groups can be reordered within their containing group by drag and drop.

Reparenting a component group

A component group can be moved to another group within the stimulus set tree by drag and drop.

WARNING: Reparenting a component group will also remove:

• all stimulus components derived from the both the old and new component groups (old parent and new parent) on any trials timeline they've been added to.
• any trials rules related to the root component group (if any) containing the group.
• any trials rules related to removed stimulus components.
• any trials rules related to the removed component groups.

Setting composition strategy

Composition strategy determines how the blended group will be composed. Click Composition: random to set the blending strategy and choose from the following:

• Random: items from each group will be blended randomly.
• Random: recompose: items from each group will be blended randomly. Items will be re-blended randomly for every set of trials that use this set.
• Interleaved: sequential: items from each group will be interleaved in order of group. For example, given groups A,B,C the first result will be A1,B1,C1. Second will be A2,B2,C2 and so forth.
• Interleaved: random: items from each group will be interleaved in random group order. For example, given groups A,B,C the first result might be A1,C1,B1. Second might be B2,A2,C2 and so forth.
• Interleaved: random recompose: items from each group will be interleaved in random group order. For example, given groups A,B,C the first result might be A1,C1,B1. Second might be B2,A2,C2 and so forth. Items will be re-interleaved randomly for every set of trials that use this set.
• Grouped: sequential: each groups items will be allocated in order of group. For example, given groups A,B,C the result will be A1..An,B1..Bn,C1..Cn.
• Grouped: random: each groups items will be allocated in random group order. For example, given groups A,B,C the result might be A1..An,C1..Cn,B1..Bn.
• Grouped: random recompose: each groups items will be allocated in random group order. For example, given groups A,B,C the result might be A1..An,C1..Cn,B1..Bn. Group order will be recomposed randomly for every set of trials that use this set.