8.3 Common Traps and Distractor Patterns

8.3 Common Traps and Distractor Patterns

The BJT is a four-option multiple-choice test, which means three out of every four options are designed to look right. Understanding how distractors are constructed is more efficient than memorizing every vocabulary item, because the same trap patterns recur across all three parts.

Ten Recurring Distractor Patterns

Part-Specific Traps

Part 1 Traps (聴解)

Part 1 relies on phonetic confusion and memory limits.

• Similar-sounding words: 書類 (shorui, documents) vs 写真 (shashin, photo); 署名 (shomei, signature) vs 捺印 (nattin, stamp); コピー (copy) vs コピー機 (copy machine).
• Number pairs: 14 (jūyon) vs 40 (yonjū); 17 (jūnana) vs 70 (nanajū); 9 (kyū) vs 19 (jūkyū).
• First-mention trap: The speaker mentions one item first as background, then names a different item as the actual answer.
• Mid-conversation correction: 「田中部長が行きます…あ、失礼しました、鈴木部長に変わります」 — the answer is 鈴木部長, not 田中部長.

Part 2 Traps (聴読解)

Part 2 traps exploit the simultaneous reading and listening load.

• Bar chart axis confusion: confusing 年 (year) and 月 (month) on the x-axis, or reading % vs 割合 (proportion) on the y-axis.
• Table row/column swap: option quotes a number from the wrong row, e.g., reading the Tokyo row when the question asked about Osaka.
• Schedule AM/PM swap: option uses 9:00 (morning) when the meeting is actually 21:00 (evening).
• Wrong chart selected: the document contains three charts; the option quotes from the chart that does not answer the question.

Part 3 Traps (読解)

Part 3 traps are grammatical and rhetorical.

• 二重敬語 (double honorific): e.g., お召し上がりになる — already sonkeigo, so an option that adds further honorifics is wrong.
• Polarity flip: おかげ (positive cause) vs せい (negative cause); 赤字 vs 黒字; 増加 vs 減少; 改善 vs 悪化.
• Fact vs opinion: option presents a stated opinion as if it were the document's conclusion.
• Conditional missing: option drops 「〜場合」 or 「〜予定」 and states the outcome as a fact.
• Right verb, wrong register: option uses 言う (plain) for a customer's action that should be おっしゃる (sonkeigo).

Counter-Strategies

For Listening (Parts 1 and 2)

• Take notes during the audio. Write the speaker, the topic, and one keyword per option. Do not rely on memory.
• Listen for corrections. Words like あ、失礼しました、訂正します、いや、ではなく flag a correction.
• Watch for conditionals. もし、〜たら、〜場合、〜予定, 予定 signal that the answer depends on a condition.

For Reading (Part 3)

• Read the question first, then locate the keyword in the passage. Do not read the whole passage before reading the question.
• Check polarity first: is the passage saying the number went up or down? Is the cause positive or negative?
• Then check register: is the actor a customer (sonkeigo), a colleague (teineigo), or the speaker themselves (kenjougo)?
• Then check verb form: is the verb plain, respectful, humble, or formal?

For All Parts

• Eliminate two options first, then choose between the remaining two. Two distractors are usually easy to spot; the third is the subtle one.
• Do not anchor to the first option that looks right. Read all four before marking.
• Match scope: the correct answer answers the question that was asked, not a related question.

Worked Examples of Distractor Analysis

Vocabulary for Distractor Analysis

These words appear in questions and explanations about distractors:

• 似て非なる (similar but different)
• 逆 (opposite)
• 部分一致 (partial match)
• 全体不一致 (overall mismatch)
• 訂正 (correction)
• 条件付き (conditional)

Recognizing these trap patterns is a skill that compounds across the test. Once you have identified a distractor pattern, the same option in a future question becomes easy to spot, which is why drilling the patterns is more efficient than drilling individual questions.