☰ SAT · Reading and Writing

Command of evidence: text

SAT Reading and Writing · Information and Ideas · Week 5 of the 12-week plan
2

Command of evidence: text

College Board skill: Command of Evidence (Textual)
GoalDecide which quotation or finding best supports, or weakens, a claim, and reject choices that are only related to it.
On the test

Information and Ideas is about 26% of the Reading and Writing section (12–14 of 54 questions). In the textual evidence questions you read a short passage about a claim, hypothesis or character and choose the quotation or finding that most directly supports or weakens it.

Key words
claim · a statement that the author wants you to accepthypothesis · a possible explanation that scientists want to testevidence · facts, results or quotations used to back up a claimsupport / weaken · to make a claim more likely / less likely to be true
Explanation

Two kinds of question

In the first kind, a scientist, historian or economist makes a claim, and you choose the finding that would support it (or weaken it). In the second kind, you read a poem, story or play excerpt and choose the quotation that best illustrates a statement about it. Both kinds ask the same thing: which choice connects most directly to the exact claim?

TypeTypical questionWhat to do
FindingsWhich finding, if true, would most directly support / weaken the claim?Ask: if this were true, what would it tell us about the claim?
QuotationsWhich quotation from the text best illustrates the claim about …?Find the words that show the idea, not just the topic.

A five-step routine

Do not read the choices until you have the claim clear. Say the claim in your own words, underline its exact parts (who or what, what happens, in which direction), and predict what the perfect evidence would look like. Then test every choice against all the parts of the claim.

Support, weaken and “directly”

A finding supports a claim if it makes the claim more likely; it weakens the claim if it makes it less likely. Read the verb in the question twice: students often choose the right idea for the wrong direction. “Most directly” means that the choice must speak to the very thing the claim says, not to a nearby topic. If a claim says that A causes B, evidence about only A, or only B, is not enough; look for a comparison that links them.

Wrong-answer typeWhat it looks like
Related but irrelevantTrue and on the same topic, but says nothing about the claim
Partial matchFits one part of the claim and ignores the other
Opposite directionWeakens when you need support, or the reverse
Too strong or too generalSays always or all when the claim is about one case

Quotations: look for the feeling, not the topic

For a literature question, the claim is often about a feeling, a change, a relationship or a theme (“the speaker feels lonely”, “the character becomes braver”). The right quotation shows that idea through actions, images or the character’s own words. A wrong quotation often mentions the same object or place but does not show the feeling. Always check that the quotation appears in the passage and says what the claim says.

Experiments: ask what we would expect to see

A hypothesis predicts something. If a scientist says that birds sing louder in noisy places, then we would expect louder songs in noisy streets than in quiet parks. Choose the result that matches the prediction and compares the right groups. A result that shows no difference, or a difference in something else, does not support the claim. To weaken a claim, look for a result that is the opposite of the prediction, or one that shows another explanation for the same result.

Worked examples
Example 1.

Ecologist Nigora Rashidova hypothesizes that birds of the same species sing at a higher pitch in busy cities than in quiet parks because the low notes of their songs are drowned out by traffic noise.

Which finding, if true, would most directly support the hypothesis?
  1. Birds in the city begin nesting a few weeks earlier in spring than birds in parks.
  2. Songs recorded on noisy streets had a higher average pitch than songs of the same species recorded in quiet parks.
  3. Birds in parks sing more often at dawn than birds in the city do.
  4. The songs of city birds and park birds were found to have the same average pitch.
  1. The claim: city birds sing higher than park birds (the same species), because traffic noise hides low notes.
  2. The perfect evidence: recordings that show higher pitch in noisy places than in quiet ones.
  3. Choice B says exactly that, so it supports the hypothesis.
  4. A and C are about other behavior, and D is the opposite result.
Trap: Choice C also compares city and park birds, so it feels relevant, but it is about when the birds sing, not about the pitch.
Example 2.

Education researcher Sardor Ismoilov claims that having a vegetable garden at a school increases student attendance because students want to take care of their plants.

Which finding, if true, would most directly weaken the claim?
  1. Schools with gardens spend more money on tools than schools without gardens.
  2. Students at schools with gardens said that they enjoy science lessons.
  3. Attendance at schools with gardens was no higher than at similar schools without gardens.
  4. Most schools with gardens are located in rural areas.
  1. The claim: gardens increase attendance.
  2. To weaken it, we need evidence that attendance does not rise when there is a garden.
  3. Choice C says attendance was the same at similar schools, so the garden made no difference.
  4. A, B and D are true-sounding facts that never mention attendance.
Trap: Choice B sounds like evidence about students and gardens, but enjoying science is not the same as attending school more.
Example 3.

The market lamps are lit tonight, / but not the ones I know. / I buy a pear I do not want / and watch the people go. / My mother’s kitchen, small and warm, / is a thousand miles away; / I hold the pear and think of her / at the end of the day.

Which quotation from the poem most effectively illustrates the claim that the speaker feels sadness about being far from home?
  1. “The market lamps are lit tonight”
  2. “I buy a pear I do not want”
  3. “and watch the people go”
  4. “My mother’s kitchen, small and warm, / is a thousand miles away”
  1. The claim has two parts: sadness and distance from home.
  2. Choice D names the speaker’s home (“mother’s kitchen”) and the distance (“a thousand miles away”).
  3. A only describes the scene. B and C show the speaker doing something, but not feeling sad about home.
Trap: Choice B hints at an empty mood (“do not want”), but it does not mention home or distance.
Example 4.

Marine biologist Zarina Alieva hypothesizes that young sea turtles use Earth’s magnetic field to decide which way to swim. She places hatchlings in a round tank surrounded by electric coils that can reverse the direction of the magnetic field around the tank.

Which result, if true, would most directly support the hypothesis?
  1. The hatchlings swam in the same direction whether the field was normal or reversed.
  2. The hatchlings swam faster in warm water than in cool water.
  3. When the coils reversed the magnetic field, the hatchlings turned and swam in the opposite direction.
  4. The hatchlings swam toward the brightest lamp in the room.
  1. The hypothesis predicts that if the magnetic field changes, the swimming direction should change too.
  2. Choice C describes exactly that.
  3. A is the opposite result (it weakens the hypothesis). B is about temperature. D suggests the turtles follow light, another explanation.
Trap: Choice D describes direction of swimming, so it seems on topic, but it points to light rather than to the magnetic field.
Common traps
  • Choosing a related factAsk: would this fact change how likely the claim is? If not, it is only related. The right answer must speak to the claim itself.
  • Matching only part of the claimUnderline every part of the claim (who, what, direction, reason). The right choice covers them all.
  • Mixing up support and weakenCircle the verb in the question. Before choosing, say aloud: “This makes the claim more / less likely.”
  • Falling for a quotation that mentions the topic but not the feelingThe claim says what the quotation must show: sadness, pride, change. A description of a place or an object is not enough.
  • Choosing an extreme statementWords such as always, all, never and only are usually too strong. Evidence for one case does not prove a rule for every case.
  • Ignoring the comparison groupFor experiments, support needs a comparison: a group with the factor against a group without it. A result with no comparison proves little.
Quick check
1
Claim: “Plants grow taller in blue light than in red light.” Does the finding “Plants under red light grew taller than plants under blue light” support or weaken it?
2
The claim is that a poem’s speaker feels lonely. Is the quotation “The street was long and the lamps were bright” good evidence?
3
What does “most directly” mean in a finding question?
4
A scientist claims that fertilizer X increases tomato size. Which evidence is stronger: (a) tomatoes with X were larger than tomatoes without X in the same garden; (b) tomatoes with X were red?
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