playground.rb

class Question
end

class Answer
  attr_reader :question, :score

  def initialize(question, score)
    @question = question
    @score = score
  end
end

module AnswerScoreHelpers
  refine Answer do
    def low?
      score < 3
    end

    def neutral?
      score == 3
    end

    def high?
      score > 3
    end
  end
end

class Response
  using AnswerScoreHelpers
  attr_reader :answers

  def initialize(answers = [])
    @answers = answers
  end

  def low_answers_for_question(question)
    answers.select(&for_question(question)).select(&:low?)
  end

  def for_question(question)
    ->(answer) { answer.question == question }
  end
end

question = Question.new

answer_1 = Answer.new(question, 1)
answer_2 = Answer.new(question, 2)
answer_3 = Answer.new(question, 3)
answer_4 = Answer.new(question, 4)
answer_5 = Answer.new(question, 5)

response = Response.new([answer_1, answer_2, answer_3, answer_4, answer_5])
p response.low_answers_for_question(question)