NNAT3 Level E flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Pattern completion edge matching

The missing piece must continue every line, color boundary, and shape that touches the cut edge. Check the seam first, since edge mismatches eliminate options faster than interior detail.

Repeating unit cell

The smallest block of a pattern that repeats across the grid. Count squares until the motif restarts to find its size, then confirm the missing piece contains exactly that block.

Symmetry check for completion

A completed pattern often has mirror or rotational symmetry. Test whether the chosen option makes the whole design symmetric; an asymmetric result usually signals a wrong option.

Rotation distractor

An answer choice showing the correct motif turned 90 or 180 degrees. It looks familiar but breaks edge continuity, so it is wrong whenever the pattern is not itself rotated.

Layered pattern completion

Some grids combine two motifs, such as a checkerboard under diagonal stripes. The correct piece must satisfy both layers at once, not just the more visible one.

Color proportion test

Count how many cells of each color appear in the intact pattern. The correct missing piece keeps the same proportion once inserted into the completed figure.

Interior detail comparison

When two options both fit the edges, compare small shapes inside the piece: their number, orientation, and spacing must match the repeating unit exactly.

Analogy operation classification

Name the single change from first to second figure: rotation, reflection, size, color, count, or addition. Apply that same named operation to the third figure.

Direction of change rule

If the first figure grows toward the second, the third must grow toward the answer. The direction of change is fixed even when absolute sizes differ.

Reflection versus rotation

Reflection reverses handedness, so a left-pointing flag points right. Rotation preserves handedness. Check one asymmetric feature to tell which operation occurred.

Compound analogy operations

Some analogies apply two changes in sequence, such as rotate then recolor. The answer must apply both operations to the third figure in the same order.

Reverse relation trap

An option that applies the second-to-first relation instead of first-to-second. Common when the change is size or color, which can look symmetric at a glance.

Position mapping in analogies

Number elements left to right in the first figure and locate each in the second. Apply that same positional map to the third figure to build the answer.

Nested shape analogy

When figures contain an inner and outer shape, decide whether the analogy concerns the inner shape, the outer shape, or their count before selecting an option.

Constant difference in series

Count sides, dots, or shaded cells in each frame and subtract consecutive counts. A constant difference means the blank continues that arithmetic progression.

Rotation step in series

Measure the angle between consecutive frames, often 45 or 90 degrees. The next frame rotates by that same angle in the same direction.

Alternating feature cycles

Some sequences change different features on separate cycles, such as color every frame and shape every two frames. Track each feature independently to find the blank.

Growth increment rule

A shape may gain one side or one ring per frame. Confirm the increment is constant across all given frames before extrapolating to the blank.

Marker movement pattern

A dot or marker may move one cell clockwise, bounce at an edge, or shift by increasing steps. Test each hypothesis against every visible frame.

Full-sequence rule test

A valid rule must explain every given frame, not only the last two. A rule fitting just the final pair is probably coincidence and should be rejected.

Simpler rule preference

If two rules fit the visible frames, choose the one using a single consistent operation. Test sequences avoid irregular compound rules.

Series blank position

The blank may fall at the end, the start, or the middle. If in the middle, use the frames on both sides to confirm the step size.

Paper-fold unfolding

Each fold creates mirror symmetry across the fold line. Unfold in reverse order, reflecting every hole across its fold line to reconstruct the flat sheet.

Cube net opposite faces

In a cube net, faces separated by exactly one square end up opposite each other. Opposite faces never appear adjacent on the folded cube.

Transparent overlay union

Superimposing two figures keeps every line appearing in either one. The answer is the union of the lines unless the item specifies intersection.

Clockwise order preservation

Rotation keeps the clockwise order of a figure's features; reflection reverses it. If an option reverses the order, it is a mirror image and wrong.

Asymmetric feature anchor

Pick one off-center dot or slanted edge as an anchor. Track where it lands in each option to detect mirror-image distractors quickly.

Region counting in overlays

Count enclosed regions and line segments before and after combining figures. The correct option preserves the total unless the operation deliberately removes overlap.

Mental rotation strategy

Rotate the figure in fixed steps, tracking one landmark feature at a time. Confirming two landmarks is usually enough to select the correct option.

Fold-line symmetry

A crease acts as a mirror axis. Any hole punched through folded paper appears on both sides of the crease once the paper is fully unfolded.

Adjacent face rule

Faces sharing an edge in the net share an edge on the cube. Use this to reject options that place net-adjacent faces opposite each other.

Shape combination subtraction

When one figure is removed from another, keep only lines not shared by both. The answer is the difference, so shared segments disappear.