A composer wants to end an antecedent phrase in a way that creates forward momentum and implies an answering phrase must follow. Which cadence type is most appropriate?
APerfect authentic cadence (V–I with scale degree 1 in the soprano), because strong closure invites continuation
BHalf cadence (ending on V), because the unresolved dominant creates an expectation that must be satisfied
CDeceptive cadence (V–vi), because the surprise redirects momentum toward the consequent
DPlagal cadence (IV–I), because its gentle arrival leaves energy for continuation
A half cadence ends on the dominant, which is harmonically unstable and demands resolution — exactly what creates the sense of an 'open question' requiring a consequent phrase. This is the standard antecedent punctuation in period form. A perfect authentic cadence would provide strong closure, the opposite of what's needed. The deceptive and plagal cadences serve different structural purposes.
Question 2 Multiple Choice
What is the primary structural function of a deceptive cadence (V–vi)?
ATo provide the strongest possible harmonic closure at a major formal boundary
BTo subvert the listener's expectation of resolution, enabling formal extension or intensification
CTo create a gentle, settling conclusion that differs from the authentic cadence
DTo confirm a key change by ending on vi, which suggests the relative minor
The deceptive cadence creates an expectation of resolution (V seems about to resolve to I) and then pivots to a different harmony (vi). This subverts closure rather than achieving it — the music cannot stop because the expected resolution was denied. Composers use this to extend phrases, delay closure, intensify a moment, or propel the music forward. It is a tool of withholding, not of concluding.
Question 3 True / False
A half cadence at the end of a phrase creates forward momentum because the dominant harmony remains unresolved, implying a continuation must follow.
TTrue
FFalse
Answer: True
This is the structural logic behind period form: the antecedent phrase ends with a half cadence (open, expectant), and the consequent phrase provides the answering authentic cadence (closed, resolved). The half cadence works as a question mark precisely because the dominant is the most unstable diatonic harmony — it strongly implies tonic resolution is coming, which is why the phrase cannot simply stop there.
Question 4 True / False
A weak or inconclusive cadence in a composition generally represents a structural flaw that the composer should have corrected.
TTrue
FFalse
Answer: False
Weak or inconclusive cadences are frequently intentional compositional choices that serve specific structural purposes. A half cadence maintains momentum. A deceptive cadence creates surprise and enables extension. A composer who places an inconclusive cadence when closure would be premature is making an architectural decision, not an error. The distinction between intentional inconclusiveness and failure to achieve closure is a matter of craft and context.
Question 5 Short Answer
Explain the difference between a half cadence and a deceptive cadence as structural devices. In what compositional situations would each be preferable?
Think about your answer, then reveal below.
Model answer: A half cadence (ending on V) is an open, expectant conclusion that creates incompleteness — best used at the end of an antecedent phrase requiring a following consequent, or wherever the music should feel suspended and forward-leaning. A deceptive cadence (V–vi) arrives at the moment the listener expects closure and pivots away from it — a rhetorical move of surprise and denial. It works best when the composer wants to extend a phrase past its expected endpoint, intensify an emotional moment by refusing resolution, or create a narrative swerve. The half cadence is about open expectation; the deceptive cadence is about thwarted expectation.
The key distinction is between 'not yet resolved' (half cadence) and 'refused resolution' (deceptive cadence). Both withhold closure but through different mechanisms with different emotional effects. Understanding this requires grasping cadences as structural punctuation with specific rhetorical effects, not merely as chord progressions to be classified.