Cognitive Reflective Test (CRT)

A bat and a ball cost £1.10 in total. The bat costs £1.00 more than the ball. How much does the ball cost?

[Harga sebuah tongkat pemukul kasti dan sebuah bola adalah $1.10. Harga tongkat pemukul kasti $1.00 lebih dari pada bola. Berapa harga bola? (jawab dalam satuan cent. $1=100 cents)]

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If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

[Dibutuhkan 5 mesin selama 5 menit untuk membuat 5 buah alat. Berapa lama 100 mesin dapat membuat 100 alat? (jawab dalam satuan menit)]

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In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

[Di sebuah danau, ada bagian yang tertutup tanaman apung. Setiap hari tanaman apung tersebut bertambah ukurannya 2x lipat. Jika dibutuhkan waktu 48 hari untuk tanaman apung menutupi seluruh danau, berapa hari tanaman tersebut menutupi setengah danau? (jawab dalam satuan hari)]

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If John can drink one barrel of water in 6 days, and Mary can drink one barrel of water in 12 days, how long would it take them to drink one barrel of water together?

[Jika John dapat meminum segalon air dalam waktu 6 hari, dan Mary dapat meminum segalon air dalam waktu 12 hari, jika mereka minum bersama-sama, berapa lama mereka dapat menghabiskan segalon air? (jawab dalam satuan hari)]

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Jerry received both the 15th highest and the 15th lowest mark in the class. How many students are in the class?

[Pada saat bersamaan, Jerry mendapatkan nilai ke-15 tertinggi dan ke-15 terendah di kelas. Berapa jumlah murid di dalam kelas?]

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A man buys a pig for £60, sells it for £70, buys it back for £80, and sells it finally for £90. How much has he made?

[Seorang laki-laki membeli seekor babi seharga $60, kemudian menjualnya dengan harga $70, membelinya kembali dengan harga $90, dan terakhir menjualnya dengan harga $90. Berapa keuntungan yang didapatkan? (jawab dalam satuan $)]

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​Simon decided to invest £8,000 in the stock market one day early in 2008. Six months after he invested, on July 17, the stocks he had purchased were down 50%. Fortunately for Simon, from July 17 to October 17, the stocks he had purchased went up 75%. At this point, Simon has:

• • (a) Broken even in the stock market

  • (b) Ahead of where he began

  • (c) Lost money

[Simon memutuskan untuk menginvestasikan $8,000 di pasar saham diawal 2008. 6 bulan setelah itu, yaitu tanggal 17 July 2008, saham yang dia beli turun 50%. Simon beruntung karena dari 17 July 2008 sampai dengan 17 Oktober 2008, saham yang dia beli naik 75%. Pada saat ini, Simon:

• • (a) Impas

  • (b) Untung

  • (c) Rugi]

Sumber:

Frederick, S. Cognitive Reflection and Decision Making. J. Econ. Perspect. 19, 25–42 (2005).

Toplak, M. E., West, R. F. & Stanovich, K. E. Assessing miserly information processing : An expansion of the Cognitive Reflection Test. Think. Reason. 20, 147–168 (2014).