Coin Bar,2
Which of the following behaviors is typically reinforced on a variable-ratio schedule?
Which of the following behaviors is typically reinforced on a variable-ratio schedule?
1. paying a cashier for a candy bar
2. checking the mailbox to see if the mail has arrived
3. studying for unexpected quizzes
4. inserting coins into a slot machine
Slot machines
Austen’s Sick Coin Skills 2 – Bar Games
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Forever Lazy ~ Adult Footed Pajamas ~ One Piece Sleepwear! Size Adult Large/X Large $0.77 Forever Lazy ~ Adult Footed Pajamas ~ One Piece Sleepwear! Size Adult Large/X Large… |
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600g Digital Flip Cover Pocket Findings Scales with Blue Backlight $5.96 The scale features weigh modes in gram (g), ounce (oz) penny weight (dwt) and grains (gn). The insides cover also features a label listing the key function and calibration steps. The hinged hard cover protects the scale so no pressure is applied to the weighing platform while the scale is not in use or carried in your shirt pocket. The amazing small size ( 5″ x 3″ x 0.75″) of the scale makes it a … |
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DigiWeigh DW-20D Digital Scale PLUS Goldsmith’s Accessory Pack $79.99 The DW-20D Precision Scale by DigiWeigh has proven itself as one of the most accurate scales in the industry through its usage in laboratories for its precise measurements and easy read outs. Easily change weight units between Grams (g), Carats (ct), Ounces (oz), Troy Ounces (ozt), Grains (gr/gn), and Pennyweight (dwt) with one button! With Scale Capacities x Accuracies of: 20 x 0.001 g, 100 x 0.0… |
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Bach 2000 Light (Without Sacred Cantatas) $849.98 The Bach renaissance–which began in earnest in the early 19th century thanks to the efforts of Felix Mendelssohn and others–inspired an endeavor of far-reaching significance. It led to the founding of the Bach Society in 1850, with the goal of gathering and publishing the composer’s complete works, and thus set into motion one of the great projects of musical scholarship. That effort has contin… |
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Early Solo Works 1980-82 $39.00 Song list: 1 Glass Of Time (4:34) 2 Mt. St. Helens (4:57) 3 Coin-Op Era (4:13) 4 Labyrinth (7:33) 5 Spring 1980 (3:55) 6 While Crome Yellow Shine (4:37) 7 Two Worlds (4:40) 8 4 Bars – 1 Unit (5:57) 9 Song (2:45) 10 Siam (5:41) 11 Frames Of Mind (5:43) 12 Elements (5:34) 13 Audia (5:08) and 14 Cycles (3:25)… |
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Silver Fineness Testing Set by PuriTEST! Test Jewelry, Antiques, Coins, Spoons, Flatware & More 999 985 950 925 Sterling Silverplate $17.99 Trusted by professionals.. easy enough for beginners. The acid test kit enables you to safely and accurately test the purity of silver items such as coins, jewelry and antiques. Test stone measures 6 inches x 3 inches; rubber backing holds stone in place while you test. This “scratch stone” is wonderful because it helps you acquire a sample to test (do not apply acid directly to your coin/jewle… |
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600 Gram Digital Scale, Electronic Balance, over 20 Ounces $14.99 The design, precision, and reliability of this scale makes it the perfect accessory for all types of hobbyists. Whether you enjoy metal detecting, scuba diving for shipwreck treasures, mining for gemstones, or collecting scrap gold, you will find this model to be a perfect tool for weighing precious metals, jewels, and other treasures. The large steel platform and durable, clear plastic expansion … |
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Complete PuriTest Gold Test Kit Plus Tools and Free Samples Gold Silver Bars $24.99 This complete kit enables you to test a wide range of gold samples, over a wide range of purity levels. You will receive one bottle each of 10k solution, 14k solution, 18k solution, and 22k solution–each bottle contains 1/2 fluid ounce (0.50 fl oz); also two (2) pro stones, a file, a PuriTEST 30x magnification loupe, Use mini gold and silver bars for test demonstration/practice, or as investment… |
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Plastic Gold Coins (100 count) $2.99 Pack includes 100 plastic gold molded coins w/embossed design. Hide the pirate treasure and let the fun begin!… |
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PAN AMERICAN .999 Pure Silver: 1 Troy Ounce Bullion Bar NWT Mint This is a 1 Troy Ounce bar of Pan American .999 PURE silver. Silver is an excellent investment (if it’s pure) because no matter how much value the American dollar loses, silver will hold its value as precious and desired commodity. Bullion silver is in such incredibly high demand now because of the recession, and inflation fears, that there is a worldwide shortage. So far, it is only a distribu… |
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